Delete support for AuroraUX.

auroraux.org is not resolving.

I will add this to the release notes as soon as I figure out where to put the
3.6 release notes :-)
optimize vector fneg of bitcasted integer value

This patch allows a vector fneg of a bitcasted integer value to be optimized in the same way that we already optimize a scalar fneg. If the integer variable is a constant, we can precompute the result and not require any logic ops.

This patch is very similar to a fabs patch committed at r214892.

Differential Revision: http://reviews.llvm.org/D4852