utils: print out DLL metadata (#596)

## Link to GitHub Issue or related Pull Request, if one exists
#592 

## Description of change
* when custom DLLs are detected (`d3d9.dll`) print out some basic data
from the PE header
* for our own NVIDIA DLL stubs, add manifest files to identify ourselves
* as a bonus, when DLL hooks are loaded from `-k`, print DLL info there
as well

This is mainly to detect when DXVK is in use.

src/spice2x/launcher/launcher.cpp

@@ -2307,6 +2307,7 @@ int main_implementation(int argc, char *argv[]) {
     // load hooks
     for (auto &hook : game_hooks) {
         log_info("launcher", "loading hook DLL {}", hook);
+        libutils::print_dll_info(hook);
         HMODULE module;
         if (!(module = libutils::try_library(hook))) {
             log_warning("launcher", "failed to load hook {}: {}", hook, get_last_error_string());