tsan: fix darwin Go build

llvm-svn: 183402

compiler-rt/lib/sanitizer_common/sanitizer_mac.cc

@@ -343,6 +343,10 @@ void BlockingMutex::CheckLocked() {
   CHECK_EQ((uptr)pthread_self(), owner_);
 }
 
+u64 NanoTime() {
+  return 0;
+}
+
 uptr GetTlsSize() {
   return 0;
 }

compiler-rt/lib/tsan/go/buildgo.sh

@@ -42,6 +42,7 @@ elif [ "`uname -a | grep Darwin`" != "" ]; then
 		../rtl/tsan_platform_mac.cc
 		../../sanitizer_common/sanitizer_posix.cc
 		../../sanitizer_common/sanitizer_mac.cc
+		../../sanitizer_common/sanitizer_posix_libcdep.cc
 	"
 elif [ "`uname -a | grep MINGW`" != "" ]; then
 	SUFFIX="windows_amd64"