[PATCH] LLVM codegen test cases updated to check instructions generated when VSX is activated on Power

[Bill Schmidt]

Except that currently there are no triples that generate VSX code because VSX code is disabled.  The specific use of -mattr=+/-vsx allows us to get closer to enabling VSX, which is the end goal (moving target) of these patches.  All of these incorrectly failing tests make it difficult to spot the actual problems.  This seems the best way forward, and the extra VSX testing is a bonus.

http://reviews.llvm.org/D5759