Fuzzer: Mark test/cxxstring.test UNSUPPORTED: windows

This has been mysteriously failing since r301593, which cleaned up the
types of things like size_t and SIZE_MAX for freestanding targets.  Reid
and Kostya suggested marking it as UNSUPPORTED on windows, given that no
one has been able to reproduce locally.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301719 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed