powerpc garbage collect test

[Matthias Klose]

On 7/9/20 3:27 PM, Alan Modra wrote:
> ld's garbage collection test on powerpc64 catered for old compilers
> (pre -mcmodel=medium support), setting options that caused the test to
> fail.  Which meant the test wasn't really testing anything.  Get rid
> of that old compiler support, and avoid -fPIE fails on ppc32.
> 
> 	* testsuite/ld-gc/gc.exp: Don't set -mminimal-toc for powerpc64,
> 	and remove powerpc64 xfail.  Use -fno-PIE for ppc32.

please could you commit this to the 2.35 branch as well?

Thanks, Matthias