Fix build dependencies for making an installable development build [2/2]

Fix a sass-rails Gem dependency and a new Puma dep on libssl-dev.

 build_sledgehammer.sh                              |    4 ++++
 .../master/extra/install-crowbar-native.sh         |    2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

Crowbar-Pull-ID: eb58d7eb34947d94df37735a5737ff83f511c62b

Crowbar-Release: development