[LibFuzzer] Disable MSan test on Darwin which was added by r336619. The MemorySanitizer is

not supported on Darwin currently and so Clang refuses to compile with
`-fsanitize=memory`.

llvm-svn: 336669

compiler-rt/test/fuzzer/lit.cfg

@@ -31,6 +31,14 @@ else:
   lit_config.note('lsan feature available')
   config.available_features.add('lsan')
 
+# MemorySanitizer is not supported on OSX right now
+if sys.platform.startswith('darwin'):
+  lit_config.note('msan feature unavailable')
+  assert 'msan' not in config.available_features
+else:
+  lit_config.note('msan feature available')
+  config.available_features.add('msan')
+
 if sys.platform.startswith('win') or sys.platform.startswith('cygwin'):
   config.available_features.add('windows')
 

compiler-rt/test/fuzzer/msan.test

@@ -1,3 +1,4 @@
+REQUIRES: msan
 RUN: %msan_compiler %S/SimpleTest.cpp -o %t
 RUN: not %run %t -seed=1 -runs=10000000 2>&1 | FileCheck %s --check-prefix=NO-REPORT