[sanitizer_common] Use internal_memcpy with wcrtomb/wctomb interceptors (#138623)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
index 5a15d75..d0f9846a 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -3917,7 +3917,7 @@
   if (res != ((SIZE_T)-1)) {
     CHECK_LE(res, sizeof(local_dest));
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, res);
-    REAL(memcpy)(dest, local_dest, res);
+    internal_memcpy(dest, local_dest, res);
   }
   return res;
 }
@@ -3939,7 +3939,7 @@
   if (res != -1) {
     CHECK_LE(res, sizeof(local_dest));
     COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, res);
-    REAL(memcpy)(dest, local_dest, res);
+    internal_memcpy(dest, local_dest, res);
   }
   return res;
 }