[Driver] Move the "-o OUT -x TYPE SRC.c" flags to the end of -cc1

New -cc1 arguments, such as -faddrsig, have started appearing after the
input name. I personally find it convenient for the input to be the last
argument to the compile command line, since I often need to edit it when
running crash reproduction scripts.

Differential Revision: https://reviews.llvm.org/D62270

llvm-svn: 361530