Follow up fix for r364366.

When setting the parallelism group support MSan and use a syntactically
compact condition.

rdar://problem/51754620

llvm-svn: 364369

compiler-rt/test/ubsan/lit.common.cfg

@@ -75,6 +75,6 @@ config.available_features.add('arch=' + config.target_arch)
 
 config.excludes = ['Inputs']
 
-if "ubsan-asan" in config.available_features or "ubsan-tsan" in config.available_features:
+if ubsan_lit_test_mode in ['AddressSanitizer', 'MemorySanitizer', 'ThreadSanitizer']:
   if not config.parallelism_group:
     config.parallelism_group = 'shadow-memory'