gas/config/tc-arm.c: Fix parsing of NEON load/store element sizes.

gas/config/tc-arm.c: Fix parsing of NEON load/store element sizes.

The existing code would accept VLD2.64 and similar undefined
instructions.

gas/ChangeLog:

2013-09-16  Will Newton  <will.newton@linaro.org>

	* config/tc-arm.c (do_neon_ld_st_interleave): Add constraint
	disallowing element size 64 with interleave other than 1.

gas/testsuite/ChangeLog:

2013-09-16  Will Newton  <will.newton@linaro.org>

	* gas/arm/neon-ldst-es.d: Add VLD1.64 instructions.
	* gas/arm/neon-ldst-es.s: Likewise.
	* testsuite/gas/arm/neon-ldst-es-bad.d: New file.
	* testsuite/gas/arm/neon-ldst-es-bad.l: Likewise.
	* testsuite/gas/arm/neon-ldst-es-bad.s: Likewise.