ld/testsuite: adjust ld-arm to run shared tests only when supported

[Clément Chigot]

On Thu, Oct 27, 2022 at 3:21 AM Alan Modra via Binutils
<binutils@sourceware.org> wrote:
>
> commit 67527cffcd enabled previously disabled tests unresolved-1-dyn,
> thumb-plt and thumb-plt-got for nacl.  The first fails due to trying
> to link against mixed-lib.so which isn't compiled for nacl.  The last
> two fail with
> objdump: tmpdir/dump(.rel.plt): relocation 0 has invalid symbol index 14885104
> and
> readelf: Error:  bad symbol index: 00e320f0 in reloc

Oops, sorry for that. I thought that shared support was disabled on
nacl. Thanks for the follow up.

Clément