[Sanitizer] use u32 instead of mode_t, which is defined in Darwin headers

llvm-svn: 174189
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_mac.cc b/compiler-rt/lib/sanitizer_common/sanitizer_mac.cc
index 3bdc154..a7bde03 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_mac.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_mac.cc
@@ -52,7 +52,7 @@
   return open(filename, flags);
 }
 
-fd_t internal_open(const char *filename, int flags, mode_t mode) {
+fd_t internal_open(const char *filename, int flags, u32 mode) {
   return open(filename, flags, mode);
 }