Build a WinXP compatible version of Spice (#611)

This was a lot more background work than expected, but that is the
nature of unnecessary hobbies I guess. Most things in here are obvious,
so here's the non-obvious thoughts and notes:

1. All the XP stuff is optional, if the toolchain isn't available it
won't even try
2. The docker build is the "known good" build and now has all the
required tools for XP and checking binaries
a. If you're OK with it, can add the XP_MUST_BUILD flag to
build_docker.sh
4. New `SPICE_XP` flag to comment out blocks
5. We could technically build using the Docker image I've made for my XP
compatible LLVM toolchain, but combining the binaries into a single zip
at the end of it is somewhat tedious, so I've chosen to grab the
binaries from my release
6. I also wrote a DLL checker to make sure the final binaries are
_actually_ XP compatible, which found some issues on x86_64 (I don't
know a single game that runs on 64 bit XP, but it wasn't too much effort
so whatever). This also won't run if missing, just to save the trouble.
7. The build script is still pretty shit, I've made some minor
improvements
  a. `/usr/bin/env bash` instead of `/bin/bash` as it's more correct
  b. Adding `-it` to the docker build, so Ctrl+C actually halts it
c. Main issue is that failures don't halt, because of the custom error
catching function. This has caused a lot of frustration, maybe we can
change that

## Testing
It runs on 32 and 64 bit installs of XP. My jubeat cab is on Win10 these
days and I haven't got around to testing an actual game, but I've
distributed test builds of this to people who *have* confirmed it works
as expected.

src/spice2x/launcher/launcher.cpp

@@ -351,7 +351,7 @@ int main_implementation(int argc, char *argv[]) {
         GRAPHICS_FORCE_SINGLE_ADAPTER = true;
         GRAPHICS_PREVENT_SECONDARY_WINDOW = true;
     }
-    if (options[launcher::Options::DXDisplayAdapter].is_active() && 
+    if (options[launcher::Options::DXDisplayAdapter].is_active() &&
         options[launcher::Options::DXDisplayAdapter].value_uint32() != D3DADAPTER_DEFAULT) {
         D3D9_ADAPTER = options[launcher::Options::DXDisplayAdapter].value_uint32();
 
@@ -1227,7 +1227,7 @@ int main_implementation(int argc, char *argv[]) {
             acio::MDXF_BUFFER_FILL_MODE = acio::MDXFBufferFillMode::THREAD_MODE;
         } else if (options[launcher::Options::DDRP4IOBufferMode].value_text() == "backfill") {
             acio::MDXF_BUFFER_FILL_MODE = acio::MDXFBufferFillMode::BACKFILL_MODE;
-        } 
+        }
     }
 
     if (options[launcher::Options::MidiAlgoVer].is_active()) {
@@ -1294,7 +1294,19 @@ int main_implementation(int argc, char *argv[]) {
     }
 
     // log
-#ifndef SPICE_LINUX
+#if SPICE_LINUX
+    #ifdef SPICE64
+        log_info("launcher", "SpiceTools Bootstrap (x64) (spice2x) for Linux");
+    #else
+        log_info("launcher", "SpiceTools Bootstrap (x32) (spice2x) for Linux");
+    #endif
+#elif SPICE_XP
+    #ifdef SPICE64
+        log_info("launcher", "SpiceTools Bootstrap (x64) (spice2x) for WinXP");
+    #else
+        log_info("launcher", "SpiceTools Bootstrap (x32) (spice2x) for WinXP");
+    #endif
+#else
     #ifdef SPICE64
         log_info("launcher", "SpiceTools Bootstrap (x64) (spice2x)");
     #elif SPICE32_LARGE_ADDRESS_AWARE
@@ -1302,12 +1314,6 @@ int main_implementation(int argc, char *argv[]) {
     #else
         log_info("launcher", "SpiceTools Bootstrap (x32) (spice2x)");
     #endif
-#else
-    #ifdef SPICE64
-        log_info("launcher", "SpiceTools Bootstrap (x64) (spice2x) for Linux");
-    #else
-        log_info("launcher", "SpiceTools Bootstrap (x32) (spice2x) for Linux");
-    #endif
 #endif
 
     log_info("launcher", "{}", VERSION_STRING);
@@ -1364,7 +1370,7 @@ int main_implementation(int argc, char *argv[]) {
                 log_warning(
                     "launcher",
                     "multiple values for -{}, command line args take precedence: {}",
-                    option.get_definition().name, 
+                    option.get_definition().name,
                     value);
             } else {
                 log_warning(
@@ -1379,7 +1385,7 @@ int main_implementation(int argc, char *argv[]) {
         if (launcher::USE_CMD_OVERRIDE) {
             log_info(
                 "launcher",
-                "user specified -cmdoverride, therefore command line args took precedence over spicecfg"); 
+                "user specified -cmdoverride, therefore command line args took precedence over spicecfg");
         } else {
             log_warning(
                 "launcher",
@@ -2226,7 +2232,7 @@ int main_implementation(int argc, char *argv[]) {
         game->attach();
     }
 
-#ifdef SPICE64
+#if SPICE64 && !SPICE_XP
     if (!cfg::CONFIGURATOR_STANDALONE) {
         if (games::iidx::TDJ_CAMERA) {
             games::iidx::init_camera_hooks();
@@ -2507,7 +2513,7 @@ int main_implementation(int argc, char *argv[]) {
     // disable poke
     games::iidx::poke::disable();
 
-#ifdef SPICE64
+#if SPICE64 && !SPICE_XP
     games::iidx::camera_release();
 #endif