[TextAPI] add missing platforms for translating triples to tapi targets (#8337)

Author: cyndyishida

llvm/lib/TextAPI/Platform.cpp

@@ -49,7 +49,11 @@ PlatformType mapToPlatformType(const Triple &Target) {
   case Triple::WatchOS:
     return Target.isSimulatorEnvironment() ? PLATFORM_WATCHOSSIMULATOR
                                            : PLATFORM_WATCHOS;
-    // TODO: add bridgeOS & driverKit once in llvm::Triple
+  case Triple::DriverKit:
+    return PLATFORM_DRIVERKIT;
+  case Triple::XROS:
+    return Target.isSimulatorEnvironment() ? PLATFORM_XROS_SIMULATOR
+                                           : PLATFORM_XROS;
   }
 }