[ARM] Make human parsing of "processor does not support instruction in mode" error messages easier

[Nicholas Clifton]

Hi James,

> gas/
>
> 2015-06-29  James Greenhalgh  <james.greenhalgh@arm.com>
>
> 	* config/tc-arm.c (md_assemble): Rephrase the "selected
> 	processor does not support ARM mode" error messages.
>
> gas/testsuite/
>
> 2015-06-29  James Greenhalgh  <james.greenhalgh@arm.com>
>
> 	* gas/arm/arch7em-bad.l: Update expected errors.
> 	* gas/arm/arch7m-bad.l: Likewise.
> 	* gas/arm/arm-idiv-bad.l: Likewise.
> 	* gas/arm/arm7-bad.l: Likewise.
> 	* gas/arm/armv1-bad.l: Likewise.
> 	* gas/arm/thumb-w-bad.l: Likewise.

Approved - please apply.

Cheers
   Nick