[compiler-rt] Define COMMON_INTERCEPT_FUNCTION_MEMCPY for tsan and esan

Reviewers: eugenis

Subscribers: kubabrecka, dberris, llvm-commits

Differential Revision: https://reviews.llvm.org/D28072

llvm-svn: 290396

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc

@@ -212,6 +212,10 @@
   }
 #endif
 
+#ifndef COMMON_INTERCEPT_FUNCTION_MEMCPY
+#define COMMON_INTERCEPT_FUNCTION_MEMCPY() {}
+#endif
+
 struct FileMetadata {
   // For open_memstream().
   char **addr;