[PATCH] test-container: Avoid copying unintended system libraries

[Florian Weimer]

* Tulio Magno Quites Machado Filho:

> Some DSOs are distributed in hardware capability directories, e.g.
> /usr/lib64/power7/libc.so.6
> Whenever the processor is able to use one of these hardware-enabled
> DSOs, testroot.pristine ends up with copies of glibc-provided libraries
> from the system because it can't overwrite or remove them.
>
> This patch avoids the unintended copies by executing ld.so with the same
> arguments passed to each glibc test.

The patch looks okay to me because $(rtld-prefix) is not affected by
$(build-hardcoded-path-in-tests).  But in that case, the probing
command is definitely not run like a test would run.