lua-yajl: fixed to install the module into the right directory (see note)

Note:

By default the 'yajl.so' gets installed into '$prefix/share/lua/cmod' which
is not the default installation path for lua modules, so we changed it to
the right path which is stored inside of the $lualibdir variable if the
package is flagged 'LUA'!

lua/lua-yajl/lua-yajl.conf

@@ -12,4 +12,7 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
+# install the lua module into the right directory
+var_append cmakeopt ' ' "-DINSTALL_CMOD=$lualibdir"
+
 makeinstopt="install"

lua/lua-yajl/lua-yajl.desc

@@ -22,6 +22,7 @@
 [M] The OpenSDE Community <list@opensde.org>
 
 [C] extra/development
+[F] LUA
 
 [L] MIT
 [S] Stable