[ASan] Delete excessive 'extern "C"' around mlock* interceptors.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@184294 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/asan_interceptors.cc b/lib/asan/asan_interceptors.cc
index bdeb4c0..7643271 100644
--- a/lib/asan/asan_interceptors.cc
+++ b/lib/asan/asan_interceptors.cc
@@ -252,7 +252,6 @@
   Printf("INFO: AddressSanitizer ignores mlock/mlockall/munlock/munlockall\n");
 }
 
-extern "C" {
 INTERCEPTOR(int, mlock, const void *addr, uptr len) {
   MlockIsUnsupported();
   return 0;
@@ -272,7 +271,6 @@
   MlockIsUnsupported();
   return 0;
 }
-}  // extern "C"
 
 static inline int CharCmp(unsigned char c1, unsigned char c2) {
   return (c1 == c2) ? 0 : (c1 < c2) ? -1 : 1;