[Clang][Type] Reduce cap of TypeID from 600 to 502

Author: eopXD

clang/include/clang/Serialization/ASTBitCodes.h

@@ -1101,7 +1101,7 @@ enum PredefinedTypeIDs {
 ///
 /// Type IDs for non-predefined types will start at
 /// NUM_PREDEF_TYPE_IDs.
-const unsigned NUM_PREDEF_TYPE_IDS = 600;
+const unsigned NUM_PREDEF_TYPE_IDS = 502;
 
 // Ensure we do not overrun the predefined types we reserved
 // in the enum PredefinedTypeIDs above.