ci: enable target x86_64-unknown-linux-gnux32

[xtqqczze]

No description provided.

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

[xtqqczze]

warning: libc-test@0.1.0: detected versions: Versions { linux: Some((7, 0)), glibc: Some((2, 43)), freebsd: None, openbsd: None, netbsd: None, macos: None, emscripten: None, wasi_sdk: None }
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c: In function 'ctest_field_ptr__input_event__input_event_sec':
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c:51576:9: error: pointer targets in assignment from '__kernel_ulong_t *' {aka 'long long unsigned int *'} to 'ctest_field_ty__input_event__input_event_sec' {aka 'long long int *'} differ in signedness [-Werror=pointer-sign]
warning: libc-test@0.1.0: 51576 |     ptr = &b->input_event_sec;
warning: libc-test@0.1.0:       |         ^
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c:51579:12: error: pointer targets in returning '__kernel_ulong_t *' {aka 'long long unsigned int *'} from a function with return type 'ctest_field_ty__input_event__input_event_sec' {aka 'long long int *'} differ in signedness [-Werror=pointer-sign]
warning: libc-test@0.1.0: 51579 |     return &b->input_event_sec;
warning: libc-test@0.1.0:       |            ^
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c: In function 'ctest_field_ptr__input_event__input_event_usec':
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c:51588:9: error: pointer targets in assignment from '__kernel_ulong_t *' {aka 'long long unsigned int *'} to 'ctest_field_ty__input_event__input_event_usec' {aka 'long long int *'} differ in signedness [-Werror=pointer-sign]
warning: libc-test@0.1.0: 51588 |     ptr = &b->input_event_usec;
warning: libc-test@0.1.0:       |         ^
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c:51591:12: error: pointer targets in returning '__kernel_ulong_t *' {aka 'long long unsigned int *'} from a function with return type 'ctest_field_ty__input_event__input_event_usec' {aka 'long long int *'} differ in signedness [-Werror=pointer-sign]
warning: libc-test@0.1.0: 51591 |     return &b->input_event_usec;
warning: libc-test@0.1.0:       |            ^
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c: In function 'ctest_roundtrip__af_alg_iv':
warning: libc-test@0.1.0: /checkout/target/x86_64-unknown-linux-gnux32/debug/build/libc-test/a26df95b92415048/out/ctest_output.c:68580:1: note: the ABI of passing struct with a flexible array member has changed in GCC 4.4
warning: libc-test@0.1.0: 68580 | ) {
warning: libc-test@0.1.0:       | ^
warning: libc-test@0.1.0: At top level:
warning: libc-test@0.1.0: cc1: note: unrecognized command-line option '-Wno-unknown-warning-option' may have been intended to silence earlier diagnostics
warning: libc-test@0.1.0: cc1: all warnings being treated as errors