[PATCH] Split the TargetInfo stuff from D7380 into its own patch.

[Dan Albert]

LGTM


================
Comment at: libcxx/test/config.py:111
@@ +110,3 @@
+    def configure_target_info(self):
+        info_str = self.get_lit_conf('target_info', "None")
+        self.target_info = eval(info_str)
----------------
I'd prefer `importlib` + `getattr` instead of `eval`.

http://reviews.llvm.org/D7601

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