Add back missing libudev header file

pkg.info

@@ -1,7 +1,7 @@
 name: udev
 description: Userspace device file manager
 version: "258.2"
-revision: 1
+revision: 2
 url: https://github.com/systemd/systemd
 license: GPL-2.0-or-later,LGPL-2.1-or-later
 architecture: any

source.sh

@@ -168,6 +168,9 @@ package_udev() {
 package_libudev() {
   meson install -C build --destdir="$BPM_OUTPUT" --no-rebuild --tags libudev,libudev-devel
 
+  # Install libudev header file
+  install -Dm644 "$BPM_SOURCE"/src/libudev/libudev.h "$BPM_OUTPUT"/usr/include/libudev.h
+
   # Install man page
   install -Dm644 build/man/libudev.3 -t "$BPM_OUTPUT"/usr/share/man/man3/