loleaflet_logging defaults to true with compiled with
--enable-debug otherwise false.
Browser will print additional debug info when this property is
set to true.
Change-Id: Id9fabf134bd8d19fa1a09ca8c0987df46d4f1a4c
Top level make would now build loleaflet too if necessary.
Respect value of ENABLE_DEBUG and if present add debug-info to
generated js bundles too.
Add new rule, clean-local in loleaflet.
Change-Id: I3a9b727824f2877fc72719a8bfdeebed5448cb7d