[externals] UCRT64 support (#4035)

Testing which deps can't cross MSVCRT/UCRT barriers

- openssl
- Qt

FFmpeg and Sirit are fine--likely don't use the C99 APIs that MSVCRT is missing?

Closes #4022

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4035

externals/ffmpeg/CMakeLists.txt

@@ -59,7 +59,7 @@ endif()
 if (PLATFORM_PS4 OR PLATFORM_MANAGARM)
     # Doesn't support VA-API, don't go thru the embarrassment of trying to enable it
     list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
-elseif (UNIX AND NOT DEFINED FFmpeg_IS_CROSS_COMPILING)
+elseif (UNIX AND NOT DEFINED FFmpeg_IS_CROSS_COMPILING AND NOT ANDROID)
     find_package(PkgConfig REQUIRED)
     pkg_check_modules(LIBVA libva)
     pkg_check_modules(CUDA cuda)
@@ -169,7 +169,7 @@ if (PLATFORM_PS4)
     )
 elseif (PLATFORM_MANAGARM)
     # Required for proper stuff
-    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS 
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
         --disable-pthreads
         --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}"
     )