[tests] Accept XFAIL arguments that match any part of a feature.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@174469 91177308-0d34-0410-b5e6-96231b3b80d8
[build] Create the link for the final library install name in the lib dir.

 - Otherwise, we never were actually linking against the right library when
   building the test applications.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@174470 91177308-0d34-0410-b5e6-96231b3b80d8
[tests] One last batch of XFAILs, for tests using new symbols added to libc++.

 - As of this commit, the test suite should now fully pass on both darwin11 and
   darwin12 when testing against either a locally built libc++ or the system libc++.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@174478 91177308-0d34-0410-b5e6-96231b3b80d8