Fix a few tests on Aarch64 #2387

Job	Run time
Check MSRV	1m 9s
Check formatting	14s
Lint macOS 64bit	2m 43s
Lint iOS 32bit	54s
Lint GNUStep + exceptions	1m 26s
Lint header-translator	31s
Lint test-assembly	23s
Test macOS 12	5m 38s
Verify header translator output	56s
Assembly tests	53s
Check icrate features	0s
Test Compiler-RT	27s
Test GNUStep with libobjc2 v1.9	1m 31s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.0	1m 45s
Compiler UI	2m 5s
Test GNUStep with libobjc2 v2.1 on nightly	1m 44s
Test GNUStep 32bit	1m 23s
${{ matrix.name }}	0s
	23m 42s

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