Unbreak build on non-Linux

[jbeich]

Regressed by f9dab9d. Affects FreeBSD package (build recipe is also used on DragonFly). major + minor are in <sys/types.h> on BSDs, often implicitly included by other headers.

See also https://sourceware.org/bugzilla/show_bug.cgi?id=19239

$ cc --version
FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git llvmorg-14.0.5-0-gc12386ae247c)
Target: x86_64-unknown-freebsd14.0
Thread model: posix
InstalledDir: /usr/bin

$ meson setup _build
$ meson compile -C _build
[...]
../showmethekey-cli/main.c:14:10: fatal error: 'sys/sysmacros.h' file not found
#include <sys/sysmacros.h>
         ^~~~~~~~~~~~~~~~~

[AlynxZhou]

I added this header but finally never use it, just forget to remove that one.

I'll remove it in a new commit, thanks!

[AlynxZhou]

799735e

[AlynxZhou]

Check the latest release.