Bug 18920: Save DB_USE_TLS and FONT_DIR to install log

Bug 18920: Save DB_USE_TLS and FONT_DIR to install log

Configuration values should be included in the koha-install-log
so that when running Makefile.PL with the --prev-install-log option
values can be read from there and reapplied rather than prompting
the user on each subsequent run.
This adds FONT_DIR and DB_USE_TLS (and its dependent options) to
koha-install-log so that the set values will be written by make
during a make install or make upgrade

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>