Auto merge of #3043 - lucab:ups/linux-at-recursive, r=JohnTitor

linux-like: add AT_RECURSIVE constant

This adds the `AT_RECURSIVE` constant on Linux and Android.
It is defined as part of the kernel uapi in `fcntl.h`:
 * https://github.com/torvalds/linux/blob/v6.1/include/uapi/linux/fcntl.h#L112

Author: bors

libc-test/semver/android.txt

@@ -138,6 +138,7 @@ ATF_USETRAILERS
 AT_EMPTY_PATH
 AT_FDCWD
 AT_NO_AUTOMOUNT
+AT_RECURSIVE
 AT_REMOVEDIR
 AT_SYMLINK_FOLLOW
 AT_SYMLINK_NOFOLLOW

libc-test/semver/linux.txt

@@ -176,6 +176,7 @@ AT_PHENT
 AT_PHNUM
 AT_PLATFORM
 AT_RANDOM
+AT_RECURSIVE
 AT_REMOVEDIR
 AT_SECURE
 AT_SYMLINK_FOLLOW

src/unix/linux_like/mod.rs

@@ -1201,6 +1201,7 @@ pub const AT_REMOVEDIR: ::c_int = 0x200;
 pub const AT_SYMLINK_FOLLOW: ::c_int = 0x400;
 pub const AT_NO_AUTOMOUNT: ::c_int = 0x800;
 pub const AT_EMPTY_PATH: ::c_int = 0x1000;
+pub const AT_RECURSIVE: ::c_int = 0x8000;
 
 pub const LOG_CRON: ::c_int = 9 << 3;
 pub const LOG_AUTHPRIV: ::c_int = 10 << 3;