arm: properly range check immediate operands of VSHL and VQSHL

arm: properly range check immediate operands of VSHL and VQSHL

These two, other than VQSHLU, didn't have their immediates properly range
checked so far.

(Re-sending unchanged from the original v2 due to never having got an
answer to https://sourceware.org/ml/binutils/2013-04/msg00121.html.)

gas/
2015-01-12  Jan Beulich  <jbeulich@suse.com>

	* gas/config/tc-arm.c (do_neon_shl_imm): Check immediate range.
	(do_neon_qshl_imm): Likewise.

gas/testsuite/
2015-01-12  Jan Beulich  <jbeulich@suse.com>

	* gas/arm/neon-addressing-bad.s: Add test for invalid VSHL,
	VQSHL, and VQSHLU immediates.
	* gas/arm/neon-addressing-bad.l: Update accordingly.