check config.available_features instead

Author: kkwli

clang/test/Interpreter/lit.local.cfg

@@ -1,5 +1,6 @@
-import sys
-
 # clang-repl is not supported on AIX and zOS
-if "host-supports-jit" not in config.available_features or sys.platform == "aix" or sys.platform == "zos":
+unsupported_platforms = [ "system-aix", "system-zos" ]
+
+if "host-supports-jit" not in config.available_features or \
+  any(up in config.available_features for up in unsupported_platforms):
     config.unsupported = True