gnu: lua: Update to 5.3.3.

* gnu/packages/patches/lua52-liblua-so.patch: Rename to ...
* gnu/packages/patches/lua-liblua-so.patch: ... this. Add version comment.
* gnu/local.mk (dist_patch_DATA): Adjust patch name.
* gnu/packages/lua.scm (lua): Update to 5.3.3.
[source]: Use https URL. Use new patch name.
[home-page]: Use https URL.
(lua-5.2): New variable.
(lua-5.1)[source]: Use https URL.