[OPCODE][AARCH64]Check mapping symbol while backward searching for IT block

[Nick Clifton]

Hi Renlin,

> opcodes/ChangeLog:
> 2015-09-10  Renlin Li  <renlin.li@arm.com>
>
>      * arm-dis.c (mapping_symbol_for_insn): New function.
>      (find_ifthen_state): Call mapping_symbol_for_insn().
>
> gas/testsuite/ChangeLog:
> 2015-09-10  Renlin Li  <renlin.li@arm.com>
>
>      * gas/arm/thumb2_it_search.d: New.
>      * gas/arm/thumb2_it_search.s: New.

Approved - please apply.

Cheers
   Nick

PS.  Sorry for taking so long to review this patch.