linux: Add a generic definition for XCASE

XCASE it's defined for all the architectures, although this is not
happening currently.

The only arch definition that has a different value is powerpc

Author: 3v1n0

libc-test/semver/linux-loongarch64.txt

@@ -119,7 +119,6 @@ TIOCCBRK
 TIOCGRS485
 TIOCSBRK
 TIOCSRS485
-XCASE
 flock64
 max_align_t
 mcontext_t

libc-test/semver/linux-s390x.txt

@@ -99,7 +99,6 @@ SYS_utimes
 SYS_vfork
 TIOCCBRK
 TIOCSBRK
-XCASE
 __psw_t
 flock64
 fpreg_t

libc-test/semver/linux.txt

@@ -3638,6 +3638,7 @@ W_EXITCODE
 W_STOPCODE
 XATTR_CREATE
 XATTR_REPLACE
+XCASE
 XDP_COPY
 XDP_MMAP_OFFSETS
 XDP_OPTIONS

src/unix/linux_like/linux/arch/generic/mod.rs

@@ -272,6 +272,7 @@ pub const TIOCM_DSR: c_int = 0x100;
 
 pub const BOTHER: crate::speed_t = 0o010000;
 pub const IBSHIFT: crate::tcflag_t = 16;
+pub const XCASE: crate::tcflag_t = 0o0000004;
 
 // RLIMIT Constants
 

src/unix/linux_like/linux/arch/mips/mod.rs

@@ -242,6 +242,7 @@ pub const TIOCM_DSR: c_int = 0x400;
 
 pub const BOTHER: crate::speed_t = 0o010000;
 pub const IBSHIFT: crate::tcflag_t = 16;
+pub const XCASE: crate::tcflag_t = 0o0000004;
 
 // RLIMIT Constants
 

src/unix/linux_like/linux/arch/powerpc/mod.rs

@@ -227,6 +227,7 @@ pub const TIOCM_DSR: c_int = 0x100;
 
 pub const BOTHER: crate::speed_t = 0o0037;
 pub const IBSHIFT: crate::tcflag_t = 16;
+pub const XCASE: crate::tcflag_t = 0o0040000;
 
 // RLIMIT Constants
 

src/unix/linux_like/linux/arch/sparc/mod.rs

@@ -213,6 +213,7 @@ pub const TIOCM_DSR: c_int = 0x100;
 
 pub const BOTHER: crate::speed_t = 0x1000;
 pub const IBSHIFT: crate::tcflag_t = 16;
+pub const XCASE: crate::tcflag_t = 0o0000004;
 
 // RLIMIT Constants
 

src/unix/linux_like/linux/gnu/b64/loongarch64/mod.rs

@@ -914,7 +914,6 @@ pub const ECHOPRT: crate::tcflag_t = 0x00000400;
 pub const ECHOCTL: crate::tcflag_t = 0x00000200;
 pub const ISIG: crate::tcflag_t = 0x00000001;
 pub const ICANON: crate::tcflag_t = 0x00000002;
-pub const XCASE: crate::tcflag_t = 0x00000004;
 pub const PENDIN: crate::tcflag_t = 0x00004000;
 pub const NOFLSH: crate::tcflag_t = 0x00000080;
 

src/unix/linux_like/linux/gnu/b64/s390x.rs

@@ -568,7 +568,6 @@ pub const CIBAUD: crate::tcflag_t = 0o02003600000;
 
 pub const ISIG: crate::tcflag_t = 0o000001;
 pub const ICANON: crate::tcflag_t = 0o000002;
-pub const XCASE: crate::tcflag_t = 0o000004;
 pub const ECHOE: crate::tcflag_t = 0o000020;
 pub const ECHOK: crate::tcflag_t = 0o000040;
 pub const ECHONL: crate::tcflag_t = 0o000100;

src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs

@@ -626,7 +626,6 @@ pub const ECHOPRT: crate::tcflag_t = 0x00000400;
 pub const ECHOCTL: crate::tcflag_t = 0x00000200;
 pub const ISIG: crate::tcflag_t = 0x00000001;
 pub const ICANON: crate::tcflag_t = 0x00000002;
-pub const XCASE: crate::tcflag_t = 0x00000004;
 pub const PENDIN: crate::tcflag_t = 0x00004000;
 pub const NOFLSH: crate::tcflag_t = 0x00000080;
 pub const CIBAUD: crate::tcflag_t = 0o02003600000;