Reflect the current reality and disable lsan tests on NetBSD

LSan/NetBSD is still in development (Stop-The-World routine missed).

llvm-svn: 344035

compiler-rt/test/fuzzer/lit.cfg

@@ -27,6 +27,7 @@ config.test_format = lit.formats.ShTest(execute_external)
 # LeakSanitizer is not supported on OSX or Windows right now.
 if (sys.platform.startswith('darwin') or
     sys.platform.startswith('freebsd') or
+    sys.platform.startswith('netbsd') or
     sys.platform.startswith('win')):
   lit_config.note('lsan feature unavailable')
 else: