autotools: Move more boilerplate to gensrclist

This affects some of the EXTRA_DIST and SOURCES variables in Makefile.am
which are now defined automatically from within config/gensrclist.pl.
These changes fix breakage caused by missing files.

Change-Id: I2bc7c8b58a51e99c726b15a3f2503a4cdafb8676
Reviewed-on: http://review.couchbase.org/38430
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>