Install the data-exporting scripts to a better place than docs

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -182,12 +182,12 @@ if(NOT MACOS_APP_BUNDLE)
 		install(
 			FILES script/demo/download_demo_version.sh
 			PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_EXECUTE WORLD_READ
-			DESTINATION ${CMAKE_INSTALL_DOCDIR}/demo
+			DESTINATION ${FHEROES2_DATA}
 			)
 		install(
 			FILES script/homm2/extract_homm2_resources.sh
 			PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_EXECUTE WORLD_READ
-			DESTINATION ${CMAKE_INSTALL_DOCDIR}/homm2
+			DESTINATION ${FHEROES2_DATA}
 			)
 		install(
 			FILES script/packaging/common/fheroes2.appdata.xml