[binutils-gdb] Use aarch64_decode_insn in aarch64_displaced_step_copy_insn

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT c86a40c6c2902b73ec6f601176820c760524afd2 ***

Author: Yao Qi <yao.qi@linaro.org>
Branch: master
Commit: c86a40c6c2902b73ec6f601176820c760524afd2

Use aarch64_decode_insn in aarch64_displaced_step_copy_insn

gdb:

2015-11-05  Yao Qi  <yao.qi@linaro.org>

	* aarch64-tdep.c (aarch64_displaced_step_copy_insn): Call
	aarch64_decode_insn and decode instruction by aarch64_inst.