Auto merge of #3373 - SteveLauC:close_range, r=JohnTitor

feat: add close_range for glibc

This PR adds [`close_range(2)`](https://man7.org/linux/man-pages/man2/close_range.2.html) for Linux/glibc:

```c
#include <linux/close_range.h>

       int close_range(unsigned int first, unsigned int last,
                       unsigned int flags);
```

musl and uClibc don't have wrappers for this syscall

Author: bors

libc-test/build.rs

@@ -3378,6 +3378,7 @@ fn test_linux(target: &str) {
         "sys/fanotify.h",
         // <sys/auxv.h> is not present on uclibc
         [!uclibc]: "sys/auxv.h",
+        [gnu]: "linux/close_range.h",
     }
 
     // note: aio.h must be included before sys/mount.h

libc-test/semver/linux-gnu.txt

@@ -665,3 +665,4 @@ getmntent_r
 putpwent
 putgrent
 execveat
+close_range

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

@@ -1399,6 +1399,9 @@ extern "C" {
         envp: *const *mut c_char,
         flags: ::c_int,
     ) -> ::c_int;
+
+    // Added in `glibc` 2.34
+    pub fn close_range(first: ::c_uint, last: ::c_uint, flags: ::c_int) -> ::c_int;
 }
 
 cfg_if! {