[PATCH] [libcxx] Allow use of ShTest in libc++ tests along with other changes.

[Jonathan Roelofs]

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Comment at: test/libcxx/double_include.sh.cpp:95
@@ +94,3 @@
+#include <tgmath.h>
+#include <thread>
+#include <tuple>
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I think this needs to be guarded out using that libcpp-has-no-threads thing. Same thing for <future>, <mutex>, <shared_mutex>, and <atomic>.

================
Comment at: test/libcxx/test/config.py:25
@@ +24,3 @@
+                           ' Running the tests in the default configuration.')
+        # TODO: Set test_exec_root to a temporary directory where output files
+        # can be placed. This is needed for ShTest.
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Is this TODO still relevant?

http://reviews.llvm.org/D7073

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