LibCore: Add ErrorOr wrapper for utimensat

Author: https://github.com/cammo1123
Commit: e78be03b49
Pull-request: https://github.com/SerenityOS/serenity/pull/17789
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/caoimhebyrne
Reviewed-by: https://github.com/kleinesfilmroellchen ✅
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/pascalpuffke
Reviewed-by: https://github.com/timschumi ✅

Userland/Libraries/LibCore/System.h

@@ -172,6 +172,7 @@ ErrorOr<void> fchown(int fd, uid_t, gid_t);
 ErrorOr<void> rename(StringView old_path, StringView new_path);
 ErrorOr<void> unlink(StringView path);
 ErrorOr<void> utime(StringView path, Optional<struct utimbuf>);
+ErrorOr<void> utimensat(int fd, StringView path, struct timespec const times[2], int flag);
 ErrorOr<struct utsname> uname();
 ErrorOr<Array<int, 2>> pipe2(int flags);
 #ifndef AK_OS_ANDROID