[Tsan] Fix the atomic_race.cc test to pass on systems with high loads

Differential Revision: http://reviews.llvm.org/D6478

llvm-svn: 223122

compiler-rt/test/tsan/atomic_race.cc

@@ -36,7 +36,7 @@ void *Thread(void *p) {
   for (int i = 0; i < kTestCount; i++) {
     Test(i, &atomics[i], false);
   }
-  sleep(2);
+  sleep(4);
   for (int i = 0; i < kTestCount; i++) {
     fprintf(stderr, "Test %d reverse\n", i);
     Test(i, &atomics[kTestCount + i], false);