[arcmt/driver] For the -ccc-arcmt-* flags, claim them when -fno-objc-arc is passed to avoid the
"argument unused during compilation" warning.

rdar://14240566

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184776 91177308-0d34-0410-b5e6-96231b3b80d8