Fixed CMake problem with Ogre plugins path

cmake/FindOGRE.cmake

@@ -444,9 +444,9 @@ macro(ogre_find_plugin PLUGIN HEADER)
           PATH_SUFFIXES "" bin bin/debug debug)
       elseif (UNIX)
         get_filename_component(OGRE_PLUGIN_DIR_TMP ${OGRE_${PLUGIN}_LIBRARY_REL} PATH)
-        set(OGRE_PLUGIN_DIR_REL ${OGRE_PLUGIN_DIR_TMP} CACHE STRING "Ogre plugin dir (release)")
+        set(OGRE_PLUGIN_DIR_REL ${OGRE_PLUGIN_DIR_TMP} CACHE STRING "Ogre plugin dir (release)" FORCE)
         get_filename_component(OGRE_PLUGIN_DIR_TMP ${OGRE_${PLUGIN}_LIBRARY_DBG} PATH)
-        set(OGRE_PLUGIN_DIR_DBG ${OGRE_PLUGIN_DIR_TMP} CACHE STRING "Ogre plugin dir (debug)")
+        set(OGRE_PLUGIN_DIR_DBG ${OGRE_PLUGIN_DIR_TMP} CACHE STRING "Ogre plugin dir (debug)" FORCE)
       endif ()
     endif ()
 	

files/plugins.cfg.linux

@@ -1,7 +1,7 @@
 # Defines plugins to load
 
 # Define plugin folder
-PluginFolder=${OGRE_PLUGIN_DIR}
+PluginFolder=${OGRE_PLUGIN_DIR_REL}
 
 # Define plugins
 Plugin=RenderSystem_GL