erlc: update {id, git} in .app.src with git describe output
Merge branch 'add-git-describe-to-id-field' of git://github.com/dch/erlang.mk
[inaka/elvis#96] Elvis plugin.
Merge branch 'jfacorro.elvis.96.plugin' of git://github.com/inaka/erlang.mk
Alphabetical order build.config
Don't distclean PKG_FILE2 if it's custom
Compile Makefile-free dependencies with +debug_info only

As much as I dislike this change, this should simplify the
process of moving to erlang.mk.
Allow overriding the method and directories analyzed by Dialyzer
Add EUnit plugin
Add EUnit plugin
Fix error in EUNIT_ERLC_OPTS
Sort build.config in alphabetical order
Set 'logs' as the default report dir