[PATCH] [libcxx] Teach libcxx's lit configuration new ways to find lit.site.cfg

[Dan Albert]

================
Comment at: test/lit.site.cfg:1
@@ +1,2 @@
+# -*- Python -*- vim: set syntax=python tabstop=4 expandtab cc=80:
+
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jroelofs wrote:
> We don't usually put the vim part of this in llvm things, do we?
Should be in all of these imo (actually, it should just be a .py, but this will do).

http://reviews.llvm.org/D6255