cross

Improve handling of CFLAGS #1489

Job	Run time
cross tests x86_64-unknown-linux-gnu	3m 15s
cross tests aarch64-linux-android	4m 36s
iOS aarch64 cross-platform build	8s
cross tests aarch64-unknown-linux-gnu	4m 34s
iOS x86-64 cross-platform build	6s
cross tests aarch64-unknown-linux-musl	4m 35s
x86_64-pc-windows-gnu	4m 24s
cross tests arm-linux-androideabi	4m 35s
i686-pc-windows-gnu	4m 24s
x86_64-pc-windows-msvc - /WX	4m 23s
cargo-xwin	4m 36s
cross tests arm-unknown-linux-gnueabihf	4m 34s
x86_64-pc-windows-msvc - crt-static and /WX	4m 24s
cross tests arm-unknown-linux-musleabi	4m 33s
i686-pc-windows-msvc - /WX	4m 24s
cross tests arm-unknown-linux-musleabihf	4m 34s
cross (prebuilt nasm) - x86_64-pc-windows-gnu	1m 26s
aws-lc-rs freebsd test (13.4)	4m 23s
cross tests armv7-linux-androideabi	4m 34s
aws-lc-rs freebsd test (14.1)	4m 23s
i686-pc-windows-msvc - crt-static and /WX	4m 24s
cross tests armv7-unknown-linux-gnueabihf	4m 34s
aarch64-pc-windows-msvc - /WX	4m 22s
cross tests i686-unknown-linux-gnu	4m 34s
aarch64-pc-windows-msvc - crt-static and /WX	4m 23s
cross tests powerpc-unknown-linux-gnu	4m 33s
cross tests powerpc64-unknown-linux-gnu	4m 35s
cross tests powerpc64le-unknown-linux-gnu	4m 33s
cross tests riscv64gc-unknown-linux-gnu	4m 33s
cross tests s390x-unknown-linux-gnu	4m 33s
cross tests x86_64-pc-windows-gnu	4m 32s
cross tests x86_64-unknown-linux-musl	4m 32s
alpine-linux	2m 51s
open-harmony	4m 32s
	2h 18m 22s

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