[Patch,testsuite] Fix testcases that use bind_pic_locally

[Rainer Orth]

Hi Vidya,

> bind_pic_locally is broken for targets that doesn't pass -fPIC/-fpic by
> default [1][2].
>
> One of the suggestions was to have a effective target check called
> bind_pic_locally_ok which checks if bind_pic_locally will work and have it
> included in all the tests that uses bind_pic_locally in dg-add-options [1].

if this patch is to go in, it needs documentation for the new keyword in
gcc/doc/sourcebuild.texi.

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University