fixup! fixup! [MSan] Change overflow_size_tls type to IntPtrTy

Author: Kamil Kashapov

compiler-rt/lib/msan/msan.cpp

@@ -63,7 +63,7 @@ alignas(16) SANITIZER_INTERFACE_ATTRIBUTE THREADLOCAL u32
     __msan_va_arg_origin_tls[kMsanParamTlsSize / sizeof(u32)];
 
 SANITIZER_INTERFACE_ATTRIBUTE
-THREADLOCAL u64 __msan_va_arg_overflow_size_tls;
+THREADLOCAL uptr __msan_va_arg_overflow_size_tls;
 
 SANITIZER_INTERFACE_ATTRIBUTE
 THREADLOCAL u32 __msan_origin_tls;