[Bug testsuite/81690] libgomp.c/{target-32,thread-limit-2}.c fail for nvptx: missing usleep

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81690

--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
Pinged issue here (
https://gcc.gnu.org/pipermail/gcc-patches/2020-October/555496.html ).