[Patch, testsuite] Patch for slow tests on HPPA

[Jeff Law]

DJ Delorie wrote:
>> I wasn't sure if we wanted to use dg-timeout-factor for all
>> platforms generally or if we wanted to just add it just for
>> platforms that need it.
>>     
>
> Add a comment that says "if this list of targets grows to three, make
> this unconditional."
>   
Or fix reorg so that it isn't so bloody slow.  It wastes an incredible 
amount of time looking at insns which can't be moved due to dataflow 
concerns.  There's little doubt in my mind that if reorg used dataflow 
to get its list of insns which might be used to fill a delay slot that 
it'd be orders of magnitude faster on this kind of test.

Jeff