[Bug d/87824] x86_64-linux multilib issues

[johannespfau at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87824

--- Comment #8 from Johannes Pfau <johannespfau at gmail dot com> ---
Thanks to both of you for the advice. So we should probably enable 32bit
multilib testing on semaphore or buildkite then.

Back to this bug report:
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FAIL: libphobos.shared/loadDR.c -ldl -pthread -g execution test 
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This is fortunately only a test-setup problem:
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set libphobos_run_args "$objdir/../src/.libs/libgphobos.so"
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https://github.com/D-Programming-GDC/GDC/blob/stable/libphobos/testsuite/libphobos.shared/shared.exp#L97

This references the wrong library
([...]/objdir/x86_64-pc-linux-gnu/libphobos/testsuite/../src/.libs/libgphobos.so)
for multilib builds. I guess there should be some variable which properly
considers the multilib setup?