Disables tests that fail to compile

math_h, cmath:
    Fails a static assert because isnan(double) and isinf(double) should be
    returning bool, but aren't. This is a known problem upstream.
    http://libcxx.llvm.org/results.Linux.html

uchar_h, cuchar, version_cuchar:
    Bionic does not include this header. According to upstream, this was also a
    problem with glibc last time they ran their tests. Docs say this is fixed in
    glibc 2.16. http://libcxx.llvm.org/results.Linux.html

wctype_h, cwctype:
    This one isn't disabled, but did require a fix. The test was casting 0
    directly to a wctype_t, which fails because bionic's wctype_t is an enum.
    From the POSIX spec, it looks like bionic is allowed to do so, and this test
    should be fixed upstream.

cstdio:
    snprintf is a macro in bionic, which make it impossible for <cstdio> to
    ::using snprintf. There may be a work around for this.

quick_exit:
    Bionic supports this, but glibc does not. Also becomes available in glibc
    2.16. http://libcxx.llvm.org/results.Linux.html

max_align_t:
    Needs investigation.

aligned_storage:
    Needs investigation.

Change-Id: I62a5210f6755388dc06cce20d81530a300300bf1

test/strings/c.strings/cuchar.disabled.cpp

@@ -0,0 +1,18 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// XFAIL: apple-darwin
+
+// <cuchar>
+
+#include <cuchar>
+
+int main()
+{
+}