chore(travis): Only install libgmp3-dev on Travis
chore(travis): Only install libgmp3-dev on Travis

moander/fxa-oauth-server,mozilla/fxa-auth-server,mozilla/fxa-auth-server,moander/fxa-oauth-server,mozilla/fxa-auth-server,chilts/fxa-oauth-server,chilts/fxa-oauth-server,mozilla/fxa-auth-server