Follow up to the mainline commit (https://gcc.gnu.org/r13-3407 + backported to OG12):
"libgomp: Add offload_device_gcn check, add requires-4a.c test"

This xfails requires-4.c on pseudo-USM systems.

As mentioned in the email for that patch OG12's unified-share memory
implemention is for pseudo-USM systems where only specially allocated
memory (managed, pinned) is device accessible. - Thus, requires4.c
failed as it used static memory. (requires4a.c works as it uses
heap-allocated memory.)

Tobias

PS: For USM in mainline, see patch submission at https://gcc.gnu.org/pipermail/gcc-patches/2022-July/597976.html
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