ccc: Add -Xclang option, rename -WA, to -Xanalyzer.
 - -Xclang always forwards to clang

 - -Xanalyzer replaces -WA,; it seems like the cleaner mechanism and
    is more readable.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63349 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed