[tsan] Disable Trace.MemoryAccessSize on Mac

[glider]

Summary

According to comments at https://reviews.llvm.org/D107911,
Trace.MemoryAccessSize fails on Mac buildbots.
Because this test is newly introduced, and is the only user of the code
added in that patch, disable the test on Mac till the problem is
resolved.

[glider]

Please take a look

[azharudd]

Thanks Alex! It was not just the MemoryAccessSize test, but the other unit tests were failing too. I disabled those as well in b4b8e1446a2ba1a25488ec5e6e927fa9b54cb4f8.

compiler-rt/lib/tsan/tests/unit/tsan_trace_test.cpp

static void *Func(void *arg) {
       CHECK_EQ(mset.Get(1).write, false);
       CHECK_EQ(tag, kExternalTagNone);
       return nullptr;
     }
   };
   run_in_thread(Thread::Func);
 }
 
-TEST(Trace, MemoryAccessSize) {
+#if SANITIZER_MAC
+// Trace.MemoryAccessSize is currently failing on Mac.
+// See https://reviews.llvm.org/D107911 for more details.
+#  define MAYBE_MemoryAccessSize DISABLED_MemoryAccessSize
+#else
+#  define MAYBE_MemoryAccessSize MemoryAccessSize
+#endif
+TEST(Trace, MAYBE_MemoryAccessSize) {
   struct Thread {
     struct Params {
       uptr access_size, offset, size;
       bool res;
       int type;
     };
     static void *Func(void *arg) {
       // Test tracing and matching of accesses of different sizes.