[PATCH] Remove nasty environment variables in MachineVerifier in favor of a build option

[Owen Anderson]

Patch-patches welcome.  :-p

—Owen

> On Feb 2, 2015, at 4:25 PM, Eric Christopher <echristo at gmail.com> wrote:
> 
> FWIW the autoconf changes for this should also be trivial :)
> 
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> http://reviews.llvm.org/D7365
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