keymaps: replace dir tokens in keyboard-force-release

Use the correct udev libexec dir as well, not systemd's.

Makefile.am

@@ -1911,12 +1911,14 @@ TESTS += \
 	src/udev/keymap/check-keymaps.sh
 
 EXTRA_DIST += \
-	src/udev/keymap/check-keymaps.sh
+	src/udev/keymap/check-keymaps.sh \
+	src/udev/keymap/keyboard-force-release.sh.in
 
 CLEANFILES += \
 	$(nodist_keymap_SOURCES) \
 	src/udev/keymap/keys.txt \
-	src/udev/keymap/keys-from-name.gperf
+	src/udev/keymap/keys-from-name.gperf \
+	src/udev/keymap/keyboard-force-release.sh
 
 udevkeymapdir = $(libexecdir)/udev/keymaps
 dist_udevkeymap_DATA = \

src/udev/keymap/keyboard-force-release.sh.in

@@ -6,7 +6,7 @@
 
 case "$2" in
         /*) scf="$2" ;;
-        *)  scf="@pkglibexecdir@/keymaps/force-release/$2" ;;
+        *)  scf="@udevlibexecdir@/keymaps/force-release/$2" ;;
 esac
 
 read attr <"/sys/$1/force_release"