brew-test-bot: check dependencies' compilers too.
sync_gateway: 1.0.2 - couchbase mobile sync

sync_gateway provides the syncing backend for couchbase mobile and is
used together with couchbase-lite-ios or android to develop syncing apps
for iOS or android.

Since the project itself is named sync_gateway I kept the name for the
formula as well.
sync_gateway: add 1.0.2 bottle.