[PATCH] Default to armv7 cpu for NaCl when march=arm

[Derek Schuff]

In http://reviews.llvm.org/D8622 the discussion was that we can't just move this to clang, since there might be other frontends that use it. So we're back to this change. I moved the change down to the fallback case, which is a definite improvement and suits the original purpose of this change. I'm also still willing to do some separate cleanup, but I'm less clear on what should be done now; so I'm open to more specific suggestions on that.


http://reviews.llvm.org/D8589

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