Skip bindgen 0.70's layout tests before Rust 1.77 #949

Job	Run time
Test FIPS integration	3m 9s
clippy	8m 18s
rustfmt	11s
Cross build from macOS to Linux (x86_64-unknown-linux-gnu)	2m 1s
Cross build from macOS to Linux (FIPS) (x86_64-unknown-linux-gnu)	3m 6s
Test features	7m 37s
Test (stable)	2m 26s
Test (arm-android)	2m 0s
Test (arm64-android)	2m 8s
Test (i686-android)	1m 59s
Test (x86_64-android)	2m 3s
Test (aarch64-ios)	2m 22s
Test (aarch64-ios-sim)	2m 26s
Test (x86_64-ios)	2m 31s
Test (i686-linux)	2m 24s
Test (arm-linux)	2m 21s
Test (aarch64-linux)	2m 23s
Test (arm64-macos)	2m 23s
Test (x86_64-macos)	2m 31s
Test (x86_64-mingw)	6m 37s
Test (i686-msvc)	6m 10s
Test (x86_64-msvc)	6m 17s
	1h 13m 23s

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