[PATCH 3/57][Arm][GAS] Add support for MVE instructions: vabs and vneg

[PATCH 3/57][Arm][GAS] Add support for MVE instructions: vabs and vneg

gas/ChangeLog:
2019-05-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* config/tc-arm.c (do_neon_abs_neg): Make it accept MVE variant.
	(insns): Change vabs and vneg entries to accept MVE variants.
	* testsuite/gas/arm/mve-vabsneg-bad-1.d: New test.
	* testsuite/gas/arm/mve-vabsneg-bad-1.l: New test.
	* testsuite/gas/arm/mve-vabsneg-bad-1.s: New test.
	* testsuite/gas/arm/mve-vabsneg-bad-2.d: New test.
	* testsuite/gas/arm/mve-vabsneg-bad-2.l: New test.
	* testsuite/gas/arm/mve-vabsneg-bad-2.s: New test.