Fix test failure for missing _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
Fix test failure for missing _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS

This is a follow-up change to r331150. The CL moved the macro from individual
file to build file, but the macro is missed in a test config file.

https://reviews.llvm.org/D46385
Patch from Taiju Tsuiki <tzik@chromium.org>!


git-svn-id: 6a9f6578bdee8d959f0ed58970538b4ab6004734@331450 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi,llvm-mirror/libcxxabi