Auto merge of #3237 - loongarch-rs:loongarch64, r=JohnTitor

linux_like: Add missing constants for loongarch64

Author: bors

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

@@ -94,7 +94,8 @@ cfg_if! {
     // But they may still not have those _OLD ones.
     if #[cfg(all(any(target_arch = "x86",
                      target_arch = "x86_64",
-                     target_arch = "aarch64"),
+                     target_arch = "aarch64",
+                     target_arch = "loongarch64"),
                  not(any(target_env = "musl", target_env = "ohos"))))] {
         pub const SO_TIMESTAMP_NEW: ::c_int = 63;
         pub const SO_TIMESTAMPNS_NEW: ::c_int = 64;
@@ -113,7 +114,8 @@ cfg_if! {
                  target_arch = "arm",
                  target_arch = "aarch64",
                  target_arch = "riscv64",
-                 target_arch = "s390x"))] {
+                 target_arch = "s390x",
+                 target_arch = "loongarch64"))] {
         pub const FICLONE: ::c_ulong = 0x40049409;
         pub const FICLONERANGE: ::c_ulong = 0x4020940D;
     }