ddr: automatically register codecs on launch (#351)

## Link to GitHub Issue, if one exists
#345 

## Description of change
On launch of spice.exe / spice64.exe, call `regsvr32` on known codecs in
the `com` directory.

Add an option to skip this (`-ddrnocodec`) as a chicken bit.

## Testing
Tested 32 and 64 bit DDR.

src/spice2x/launcher/options.h

@@ -86,6 +86,7 @@ namespace launcher {
             spice2x_SDVXSubRedraw,
             LoadDDRModule,
             DDR43Mode,
+            DDRSkipCodecRegisteration,
             LoadPopnMusicModule,
             PopnMusicForceHDMode,
             PopnMusicForceSDMode,