New Objective-C runtime features #2074

Job	Run time
Lint macOS 64bit	4m 57s
Lint iOS 32bit	1m 29s
Lint GNUStep + exceptions	2m 20s
Lint header-translator	40s
Lint test-assembly	34s
Check formatting	14s
Check MSRV	1m 28s
Test macOS 12	12m 46s
Compiler UI	1m 11s
Verify header translator output	2m 7s
Test Compiler-RT	30s
Check icrate features	0s
Assembly tests	56s
Test GNUStep with libobjc2 v1.9	2m 58s
Test GNUStep with libobjc2 v2.0	2m 7s
Test GNUStep with libobjc2 v2.1 on nightly	2m 40s
Test GNUStep 32bit	3m 8s
${{ matrix.name }}	0s
Test on iOS simulator w. dinghy	0s
	40m 5s

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