TODO: add/shuffle a few items
jansson Makefile.am: remove use of -version-info

-version-info is ignored for Libtool convenience libraries (and
Libtool warns about it).  So just remove it.
netloc: move netloc configury into its own .m4 file

Shuffle things around a bit in the top-level configure.ac file, and
move all the netloc-specific setup into netloc.m4.  Also move the
CONFIG_FILES for netloc utils and tests in with the other CONFIG_FILES
for those groups.
TODO: m4 re-org done
embedded: add the right stuff for netloc embedded builds