Merge pull request #875 from mmd-osm/patch/luajit_bionic

Add luajit-2.1 to cmake include search directories for Ubuntu 18.04

Author: lonvia

cmake/FindLuaJIT.cmake

@@ -10,7 +10,7 @@
 find_path(LUAJIT_INCLUDE_DIR luajit.h
   HINTS
     ENV LUA_DIR
-  PATH_SUFFIXES include/luajit-2.0 include
+  PATH_SUFFIXES include/luajit-2.0 include/luajit-2.1 include
   PATHS
   ~/Library/Frameworks
   /Library/Frameworks