Use the release version when building without Git metadata.
EasyLPAC queries this version to determine the supported lpac features.
Also include the generated header instead of including applet/version.h itself.

--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -19,6 +19,7 @@
 add_custom_target(version
     ${CMAKE_COMMAND}
     -D SRC=${CMAKE_CURRENT_SOURCE_DIR}/version.h.in
+    -D LPAC_VERSION=v${PROJECT_VERSION}
     -D DST=${CMAKE_CURRENT_SOURCE_DIR}/version.h
     -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
     -P ${LPAC_CMAKE_MODULE_PATH}/git-version.cmake
--- a/src/applet/version.h
+++ b/src/applet/version.h
@@ -1,7 +1,7 @@
 #pragma once
 
-#include "version.h"
+#include "../version.h"
 
 #include <applet.h>
 
 extern struct applet_entry applet_version;