chore, enable server only if onion_LIBS are set

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

* bld/dist:
  chore, enable server only if onion_LIBS are set
  fix, PEBKAC, use AM_LDFLAGS (typo)
chore, don't install stuff we don't need for travis CI build

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Revert "hack, use V=1 building on travis platform"

This reverts commit c2726dbc52c13db1a1d102774d3661f5d46a3cae.