Fixed an bug in axpyv/axpym when alpha is unit.
Fixed an bug in axpyv/axpym when alpha is unit.

Details:
- Fixed bug whereby axpyv and axpym were incorrectly simplifying to a copy,
  rather than an add, when alpha = 1. Thanks to Bryan Marker for identifying
  this bug.

xianyi/blis,audiofilter/blis,arm-hpc/blis,scibuilder/blis,scibuilder/blis,audiofilter/blis,rwl/blis,rwl/blis,scibuilder/blis,audiofilter/blis,arm-hpc/blis,xianyi/blis,arm-hpc/blis,rwl/blis,rwl/blis,xianyi/blis,xianyi/blis,scibuilder/blis,audiofilter/blis,arm-hpc/blis