message: Fix missing thread sync when checking for GCN ISA support
diff: @@ -127,7 +127,7 @@ static void CacheSupport(ShaderEncoding primary, ShaderEncoding secondary = Shad
  return;
  // kick off a thread to cache these encodings' support
  - Threading::CreateThread([primary, secondary]() {
  + supportCheckThread = Threading::CreateThread([primary, secondary]() {
  encodingSupported[(size_t)primary] = CheckForSupport(primary);
  encodingSupported[(size_t)secondary] = CheckForSupport(secondary);
  