minor, make tzmap and tzmcc targets non-fatal

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, also make installing tzmaps non-fatal

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist'

* bld/dist:
  chore, also make installing tzmaps non-fatal
  minor, make tzmap and tzmcc targets non-fatal