[libc++] Purge mentions of GCC 4 from the test suite We don't support GCC 4 and older according to the documentation, so we should pretend it doesn't exist. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@372787 91177308-0d34-0410-b5e6-96231b3b80d8 
32 files changed