[PATCH] Support generating Jom-style depfiles.

[Paul Robinson]

The most obvious choice for the option would have been -MQ (Q for Quote) but that's already taken.
I picked -MV because we have a proprietary compiler that uses that option for the same purpose, but that's not a hard requirement and I'm open to suggestions.


http://reviews.llvm.org/D9260

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/