ci: enable target x86_64-unknown-redox

Author: xtqqczze

.github/workflows/ci.yaml

@@ -243,8 +243,7 @@ jobs:
           - target: x86_64-unknown-linux-musl
             env: { TEST_MUSL_V1_2_3: 1 }
             artifact-tag: new-musl
-          # FIXME: It seems some items in `src/unix/mod.rs` aren't defined on redox actually.
-          # - target: x86_64-unknown-redox
+          - target: x86_64-unknown-redox
 
           # FIXME(ppc): SIGILL running tests, see
           # https://github.com/rust-lang/libc/pull/4254#issuecomment-2636288713

src/unix/redox/mod.rs

@@ -906,8 +906,8 @@ pub const OLCUC: crate::tcflag_t = 0o000_004;
 pub const OCRNL: crate::tcflag_t = 0o000_010;
 pub const ONOCR: crate::tcflag_t = 0o000_020;
 pub const ONLRET: crate::tcflag_t = 0o000_040;
-pub const OFILL: crate::tcflag_t = 0o0000_100;
-pub const OFDEL: crate::tcflag_t = 0o0000_200;
+pub const OFILL: crate::tcflag_t = 0o0_000_100;
+pub const OFDEL: crate::tcflag_t = 0o0_000_200;
 
 pub const B0: speed_t = 0o000_000;
 pub const B50: speed_t = 0o000_001;