Driver: Don't honor -std-default for C++, this makes it hard to run the gdb test
suite with clang++ enabled.

The right fix here is PR6175, although we would still have to find a different
work around for the gdb test suite.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94838 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed