Add aarch64_be-linux-* to module tests
#21910
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std.os.linux: Add unwinding protection in clone() implementationsaarch64_be-linux-* to module tests
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The unwind info in the child process will be wrong, so explicitly zero out the frame pointer (for FP-based unwinders) and mark the link register as undefined (for DWARF-based unwinders). I only zeroed the frame pointer(s) on Arm/Thumb because LLVM's assembler really doesn't like .cantunwind directives in inline assembly.
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Experimenting to try to resolve the issue in #21911 and get 4049be9 re-landed...