tsan: change TSAN_OPTIONS->GORACE in build script as well


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@167578 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/tsan/go/buildgo.sh b/lib/tsan/go/buildgo.sh
index 86f468a..dc4a238 100755
--- a/lib/tsan/go/buildgo.sh
+++ b/lib/tsan/go/buildgo.sh
@@ -75,4 +75,4 @@
 as gotsan.s -o race_$SUFFIX.syso
 
 gcc test.c race_$SUFFIX.syso -m64 -o test $OSLDFLAGS
-TSAN_OPTIONS="exitcode=0 atexit_sleep_ms=0" ./test
+GORACE="exitcode=0 atexit_sleep_ms=0" ./test