Disable LSan sanitizer_common tests due to AppleClang not supporting

LSan (rdar://problem/45841334).

rdar://problem/47381908

apple-llvm-split-commit: 9353cee1fed01cfac83294b746dd99f11454e3e2
apple-llvm-split-dir: compiler-rt/

Author: danliew-apple

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

@@ -73,3 +73,9 @@ if config.host_os not in ['Linux', 'Darwin', 'NetBSD', 'FreeBSD']:
 
 if not config.parallelism_group:
   config.parallelism_group = 'shadow-memory'
+
+# Apple-internal: Disable LSan sanitizer_common tests
+# because AppleClang doesn't support LSan (rdar://problem/47381908).
+if config.tool_name == 'lsan' and config.host_os == 'Darwin':
+  lit_config.note('LSan sanitizer_common tests disabled')
+  config.unsupported = True