Hello,

Minor cleanups, tested together with the previous patches
introducing the vx7 support.

Committing to mainline.

With Kind Regards,

Olivier

2017-06-27  Jerome Lambourg  <lambourg@adacore.com>

    	* config/i386/vxworks.h (ASM_SPEC): Remove definition. No target
	specific need, just fallback on defaults.
    	(ASM_OUTPUT_ALIGNED_BSS): Add #undef before #define.