Add time namespace constant

This constant is a possible bitflag argument for `unshare`:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/sched.h?h=v6.6-rc1#n44

I am unsure about its support in Fuchsia, which is why I have not added
the constant there.

Author: cd-work

libc-test/semver/linux.txt

@@ -292,6 +292,7 @@ CLONE_THREAD
 CLONE_UNTRACED
 CLONE_VFORK
 CLONE_VM
+CLONE_NEWTIME
 CLOSE_RANGE_CLOEXEC
 CLOSE_RANGE_UNSHARE
 CMSG_DATA

src/unix/linux_like/mod.rs

@@ -1156,6 +1156,7 @@ pub const ONLRET: ::tcflag_t = 0o000040;
 pub const OFILL: ::tcflag_t = 0o000100;
 pub const OFDEL: ::tcflag_t = 0o000200;
 
+pub const CLONE_NEWTIME: ::c_int = 0x80;
 pub const CLONE_VM: ::c_int = 0x100;
 pub const CLONE_FS: ::c_int = 0x200;
 pub const CLONE_FILES: ::c_int = 0x400;