Clean up CLONE_ definitions

This CL moves all `CLONE_` constant definitions into
`src/unix/linux_like/mod.rs` as there are no differences between the
GNU, MUSL, and Android BIONIC definitions of these constants.

(backport <rust-lang#4672>)
(cherry picked from commit 3ba96df)

Author: chriswailes

libc-test/semver/android.txt

@@ -236,32 +236,8 @@ CLOCK_REALTIME_ALARM
 CLOCK_REALTIME_COARSE
 CLOCK_TAI
 CLOCK_THREAD_CPUTIME_ID
-CLONE_CHILD_CLEARTID
-CLONE_CHILD_SETTID
 CLONE_CLEAR_SIGHAND
-CLONE_DETACHED
-CLONE_FILES
-CLONE_FS
 CLONE_INTO_CGROUP
-CLONE_IO
-CLONE_NEWCGROUP
-CLONE_NEWIPC
-CLONE_NEWNET
-CLONE_NEWNS
-CLONE_NEWPID
-CLONE_NEWUSER
-CLONE_NEWUTS
-CLONE_PARENT
-CLONE_PARENT_SETTID
-CLONE_PIDFD
-CLONE_PTRACE
-CLONE_SETTLS
-CLONE_SIGHAND
-CLONE_SYSVSEM
-CLONE_THREAD
-CLONE_UNTRACED
-CLONE_VFORK
-CLONE_VM
 CMSG_DATA
 CMSG_FIRSTHDR
 CMSG_LEN

libc-test/semver/linux-gnu.txt

@@ -31,9 +31,6 @@ BPF_FS_MAGIC
 BTRFS_SUPER_MAGIC
 CGROUP2_SUPER_MAGIC
 CGROUP_SUPER_MAGIC
-CLONE_CLEAR_SIGHAND
-CLONE_INTO_CGROUP
-CLONE_NEWTIME
 CODA_SUPER_MAGIC
 CRAMFS_MAGIC
 DEAD_PROCESS

libc-test/semver/linux-musl.txt

@@ -6,7 +6,6 @@ AIO_ALLDONE
 AIO_CANCELED
 AIO_NOTCANCELED
 BOOT_TIME
-CLONE_NEWTIME
 DEAD_PROCESS
 EMPTY
 Elf32_Chdr

libc-test/semver/linux.txt

@@ -273,15 +273,18 @@ CLOCK_TAI
 CLOCK_THREAD_CPUTIME_ID
 CLONE_CHILD_CLEARTID
 CLONE_CHILD_SETTID
+CLONE_CLEAR_SIGHAND
 CLONE_DETACHED
 CLONE_FILES
 CLONE_FS
+CLONE_INTO_CGROUP
 CLONE_IO
 CLONE_NEWCGROUP
 CLONE_NEWIPC
 CLONE_NEWNET
 CLONE_NEWNS
 CLONE_NEWPID
+CLONE_NEWTIME
 CLONE_NEWUSER
 CLONE_NEWUTS
 CLONE_PARENT

src/unix/linux_like/android/mod.rs

@@ -2883,7 +2883,6 @@ pub const SCHED_DEADLINE: c_int = 6;
 
 pub const SCHED_RESET_ON_FORK: c_int = 0x40000000;
 
-pub const CLONE_PIDFD: c_int = 0x1000;
 pub const CLONE_CLEAR_SIGHAND: c_ulonglong = 0x100000000;
 pub const CLONE_INTO_CGROUP: c_ulonglong = 0x200000000;
 

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

@@ -886,12 +886,6 @@ pub const GENL_ID_PMCRAID: c_int = crate::NLMSG_MIN_TYPE + 2;
 
 pub const ELFOSABI_ARM_AEABI: u8 = 64;
 
-// linux/sched.h
-pub const CLONE_NEWTIME: c_int = 0x80;
-// DIFF(main): changed to `c_ulonglong` in e9abac9ac2
-pub const CLONE_CLEAR_SIGHAND: c_int = 0x100000000;
-pub const CLONE_INTO_CGROUP: c_int = 0x200000000;
-
 // linux/keyctl.h
 pub const KEYCTL_DH_COMPUTE: u32 = 23;
 pub const KEYCTL_PKEY_QUERY: u32 = 24;

src/unix/linux_like/linux/mod.rs

@@ -5665,7 +5665,8 @@ pub const SCHED_DEADLINE: c_int = 6;
 
 pub const SCHED_RESET_ON_FORK: c_int = 0x40000000;
 
-pub const CLONE_PIDFD: c_int = 0x1000;
+pub const CLONE_CLEAR_SIGHAND: c_ulonglong = 0x100000000;
+pub const CLONE_INTO_CGROUP: c_ulonglong = 0x200000000;
 
 pub const SCHED_FLAG_RESET_ON_FORK: c_int = 0x01;
 pub const SCHED_FLAG_RECLAIM: c_int = 0x02;

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

@@ -834,8 +834,6 @@ 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;
-
 pub const UT_HOSTSIZE: usize = 256;
 pub const UT_LINESIZE: usize = 32;
 pub const UT_NAMESIZE: usize = 32;

src/unix/linux_like/mod.rs

@@ -1164,10 +1164,12 @@ pub const ONLRET: crate::tcflag_t = 0o000040;
 pub const OFILL: crate::tcflag_t = 0o000100;
 pub const OFDEL: crate::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;
 pub const CLONE_SIGHAND: c_int = 0x800;
+pub const CLONE_PIDFD: c_int = 0x1000;
 pub const CLONE_PTRACE: c_int = 0x2000;
 pub const CLONE_VFORK: c_int = 0x4000;
 pub const CLONE_PARENT: c_int = 0x8000;