[client] windows: add native clang-cl build

Build the Windows client against the MSVC ABI while retaining clang
language support. Use vcpkg for ANGLE and libsamplerate, and build
MsQuic with its bundled static OpenSSL.

client/audiodevs/WASAPI/CMakeLists.txt

@@ -11,11 +11,14 @@ add_library(audiodev_WASAPI STATIC
 target_link_libraries(audiodev_WASAPI
   avrt
   lg_common
-  m
   ole32
   uuid
 )
 
+if(MINGW)
+  target_link_libraries(audiodev_WASAPI m)
+endif()
+
 target_include_directories(audiodev_WASAPI
   PRIVATE
     "${CMAKE_CURRENT_SOURCE_DIR}"