add CLONE_NEWTIME to Linux/musl

Author: SteveLauC

libc-test/semver/linux-musl.txt

@@ -81,3 +81,4 @@ reallocarray
 setutxent
 tcp_info
 timex
+CLONE_NEWTIME

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

@@ -885,6 +885,8 @@ pub const MAXTC: c_long = 6;
 pub const _CS_V6_ENV: c_int = 1148;
 pub const _CS_V7_ENV: c_int = 1149;
 
+pub const CLONE_NEWTIME: c_int = 0x80;
+
 cfg_if! {
     if #[cfg(target_arch = "s390x")] {
         pub const POSIX_FADV_DONTNEED: c_int = 6;