Attempt to fix test failure for armv8.

Looks like armv8 can't handle a thousand threads, which GWP-ASan
requests when running a synchronised mutex test. Limiting this to 100 to
attempt to fix the build issue.

llvm-svn: 362163
GitOrigin-RevId: 365e59248056e8ba24848a5857117b01a066ef68
diff --git a/tests/mutex_test.cpp b/tests/mutex_test.cpp
index 36f7e1d..5bc53b9 100644
--- a/tests/mutex_test.cpp
+++ b/tests/mutex_test.cpp
@@ -84,6 +84,6 @@
 }
 
 TEST(GwpAsanMutexTest, SynchronisedCounterTest) {
-  runSynchronisedTest(4, 100000);
-  runSynchronisedTest(1000, 1000000);
+  runSynchronisedTest(4, 1000000);
+  runSynchronisedTest(100, 1000000);
 }