[pkg-go] Bug#982931: consul FTBFS in some environments.

[Ileana Dumitrescu]

Consul FTBFS for riscv because of its dependency on raft-boltdb, which has a dependency on boltdb, which does not have support for riscv. boltdb has since been forked to coreos/bbolt which does have support for riscv, but the dependencies in consul and raft-boltdb have not been updated. The upstream for raft-boltdb needs to be updated to replace the dependency on boltdb to bbolt. See #1004303 for the issue on raft-boltdb.