Test arm64 with sonobuoy

.drone.yml

@@ -142,6 +142,14 @@ steps:
     event:
     - tag
 
+- name: sonobuoy-e2e-tests
+  image: rancher/dapper:v0.4.2
+  commands:
+  - dapper -f Dockerfile.sonobuoy.dapper
+  volumes:
+  - name: docker
+    path: /var/run/docker.sock
+
 volumes:
 - name: docker
   host:

Dockerfile.sonobuoy.dapper

@@ -1,6 +1,6 @@
 FROM golang:1.12.9-alpine3.10
 
-RUN apk -U --no-cache add bash git docker curl jq coreutils
+RUN apk -U --no-cache add bash git gcc musl-dev docker curl jq coreutils
 RUN go get -d github.com/heptio/sonobuoy && \
     git -C /go/src/github.com/heptio/sonobuoy checkout -b current v0.16.0 && \
     go install github.com/heptio/sonobuoy