Fix typo found by Clang fix for extern "C" function handling.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@185234 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/tsan/rtl/tsan_interface_atomic.cc b/lib/tsan/rtl/tsan_interface_atomic.cc
index f635660..24ce428 100644
--- a/lib/tsan/rtl/tsan_interface_atomic.cc
+++ b/lib/tsan/rtl/tsan_interface_atomic.cc
@@ -659,7 +659,7 @@
 }
 
 #if __TSAN_HAS_INT128
-a128 __tsan_atomic64_compare_exchange_val(volatile a128 *a, a128 c, a128 v,
+a128 __tsan_atomic128_compare_exchange_val(volatile a128 *a, a128 c, a128 v,
     morder mo, morder fmo) {
   SCOPED_ATOMIC(CAS, a, c, v, mo, fmo);
 }