clang-cc: Switch to using FrontendAction. Whee.

Please report any discrepancies you see in clang-cc, I'm not confident that our regression tests cover all the fun ways one can use clang-cc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88776 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed