devel/lua-language-server: Enable verbose builds and support ccache

There are two build phases: first the port builds luamake, and then
it uses luamake to build LuaLS. Verbosity (i.e. showing build
commands) and building with ccache is enabled for both phases.

Reviewed by: Dave Marker
Approved by: Dave Marker (maintianer)
Differential Revision: https://reviews.freebsd.org/D56566