[visium] Align branch absolute instruction for the GR6

[Eric Botcazou]

This is done in order to avoid a pipeline hazard on the GR6.

Tested for visium-elf, applied on mainline, 2.32 and 2.31 branches.


2019-02-07  Eric Botcazou  <ebotcazou@adacore.com>

gas/
	* config/tc-visium.c (md_assemble) <mode_cad>: Align instruction on
	64-bit boundaries for the GR6.
	* testsuite/gas/visium/allinsn_gr6.s: Tweak.
	* testsuite/gas/visium/allinsn_gr6.d: Likewise.
	* testsuite/gas/visium/bra-1.d: New test.
	* testsuite/gas/visium/bra-1.s: Likewise.
	* testsuite/gas/visium/visium.exp: Run bra-1 test.

-- 
Eric Botcazou
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