Merging r227085:

Merging r227085:
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r227085 | joerg | 2015-01-26 03:41:48 -0800 (Mon, 26 Jan 2015) | 13 lines

The canonical CPU variant for ARM according to config.guess uses a
suffix it seems:

    # ./config.guess
    earmv7hfeb-unknown-netbsd7.99.4

Extend the triple parsing to support this. Avoid running the ARM parser
multiple times because StringSwitch is not lazy.

Reviewers: Renato Golin, Tim Northover

Differential Revision: http://reviews.llvm.org/D7166

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_36@227394 91177308-0d34-0410-b5e6-96231b3b80d8