[Patch PR target/66200, target/66498, c++/66192] - Adjust aarch64_guard1.C test

[Ramana Radhakrishnan]

Sorry about missing this hunk in the original submission, was in my tree 
but I hadn't spotted this as I was playing between the original AArch64 
TARGET_RELAXED_ORDER and this patch.

Applied as obvious.
PR target/66200
PR target/66498
PR c++/66192
* g++.dg/testsuite/aarch64_guard1.C: Adjust test.