Undo "install-all-lua"

It causes compile errors for lapis

toolset/setup/linux/languages/lua.sh

@@ -3,6 +3,12 @@
 RETCODE=$(fw_exists lua.installed)
 [ ! "$RETCODE" == 0 ] || { return 0; }
 
-sudo apt-get install -y lua5.1 lua5.2 luajit luarocks
+# Eventually, we should also install lua5.2 and luajit
+#
+# At the moment they seem to cause issues with lapis 
+# being able to compile. Since no Lua test is using 
+# either luajit or lua5.2 at the moment I have just
+# left them out
+sudo apt-get install -y lua5.1 luarocks
 
 touch lua.installed