Catch cross-compiliation build failures at Travis.
Catch cross-compiliation build failures at Travis.

sweeneyb/consul,tshak/consul,hashicorp/consul,calgaryscientific/consul,mckennajones/consul,scalp42/consul,scalp42/consul,scalp42/consul,youhong316/consul,dankraw/consul,scalp42/consul,kingland/consul,42wim/consul,pmalmgren/consul,vamage/consul,pmalmgren/consul,sweeneyb/consul,pmalmgren/consul,i0rek/consul,sean-/consul,rhyas/consul,leowmjw/consul,mckennajones/consul,i0rek/consul,tugbabodrumlu/consul,rhyas/consul,vamage/consul,kingland/consul,sweeneyb/consul,mckennajones/consul,hashicorp/consul,kingland/consul,calgaryscientific/consul,vamage/consul,youhong316/consul,vamage/consul,pmalmgren/consul,youhong316/consul,mckennajones/consul,tshak/consul,rhyas/consul,calgaryscientific/consul,42wim/consul,tshak/consul,rhyas/consul,hashicorp/consul,zeroae/consul,sweeneyb/consul,pmalmgren/consul,scalp42/consul,leowmjw/consul,tshak/consul,kingland/consul,42wim/consul,leowmjw/consul,i0rek/consul,42wim/consul,dankraw/consul,tugbabodrumlu/consul,hashicorp/consul,zeroae/consul,tugbabodrumlu/consul,tugbabodrumlu/consul,sweeneyb/consul,dankraw/consul,calgaryscientific/consul,youhong316/consul,kingland/consul,dankraw/consul,zeroae/consul,zeroae/consul,tshak/consul,leowmjw/consul,dankraw/consul,i0rek/consul,sean-/consul,leowmjw/consul,zeroae/consul,calgaryscientific/consul,sean-/consul,i0rek/consul,vamage/consul,youhong316/consul,42wim/consul,rhyas/consul,tugbabodrumlu/consul,sean-/consul,sean-/consul,mckennajones/consul