update tolua repo if needed

s/cmake-init

@@ -112,15 +112,17 @@ if [ "$HAVE_TOLUA" = "0" ] || [ -z $path ] ; then
 if [ ! -d tolua/include ]; then
  echo "fetching tolua from github..."
  git clone https://github.com/ennorehling/tolua.git tolua
+ cd tolua
+else
+ cd tolua
+ git pull --rebase
 fi
 echo "building tolua..."
- cd tolua
 make
 cd -
 cat >> $BUILD/config.cmake <<TOLUA
 SET(PC_TOLUA_DIR "$ROOT/tolua" CACHE PATH "tolua root")
 TOLUA
-
 else
  echo "tolua is $path"
 fi