[Binutils][Objdump]Check symbol section information while search a mapping symbol...

[Binutils][Objdump]Check symbol section information while search a mapping symbol backward.

When checking mapping symbols backwardly, the section which defines the symbol
is not considerted. This patch fixes this by moving the section checking code
into get_sym_code_type () function which is shared by forward and backword
mapping symbol searching.

opcodes/

2017-12-11  Petr Pavlu  <petr.pavlu@arm.com>
	    Renlin Li  <renlin.li@arm.com>

	* aarch64-dis.c (print_insn_aarch64): Move symbol section check ...
	(get_sym_code_type): Here.

binutils/

2017-12-11  Renlin Li  <renlin.li@arm.com>

	* testsuite/binutils-all/aarch64/objdump.d: New.
	* testsuite/binutils-all/aarch64/objdump.s: New.