scripts/get-protoc: Update protoc from 3.1.0 to 3.2.0
scripts/get-protoc: Update protoc from 3.1.0 to 3.2.0

* Update protoc Protocol Buffer Compiler codegen tool

coreos/coreos-baremetal,dghubble/matchbox,coreos/coreos-baremetal,dghubble/matchbox,enilfodne/matchbox,enilfodne/matchbox