[testsuite] aarch64,arm Add missing quotes to expected error message

[Jeff Law]

On 5/20/19 8:50 AM, Martin Sebor wrote:
> On 5/20/19 12:56 AM, Christophe Lyon wrote:
>> Hi,
>>
>> After Martin's commit r271338, we now emit quotes around reserved
>> names, and some tests started to fail on aarch64 and arm.
>>
>> This should fix them, OK?
> 
> Thanks!  There will probably be a few more like this on other
> targets.  Jeff has been running a comprehensive build & test
> over the weekend so we should be able to clean them up this
> week.
Yea.  It looks like there's fallout on the 16 bit targets where the
diagnostics need minor updating.  That's first on the list.  But overall
the fallout looks minor.

jeff