TUN-1606: Define CloudflaredConfig RPC structure, interface for cloudflared's RPC server

cfsetup.yaml

@@ -1,5 +1,6 @@
 pinned_go: &pinned_go go=1.11.5-1
 build_dir: &build_dir /cfsetup_build/src/github.com/cloudflare/cloudflared/
+default-flavor: stretch
 stretch: &stretch
   build:
     build_dir: *build_dir
@@ -46,15 +47,15 @@ stretch: &stretch
       - export CC=arm-linux-gnueabihf-gcc
       - make release
   release-linux-386:
-      build_dir: *build_dir
-      builddeps:
-        - *pinned_go
-        - gcc-multilib
-      post-cache:
-        - export GOPATH=/cfsetup_build/
-        - export GOOS=linux
-        - export GOARCH=386
-        - make release
+    build_dir: *build_dir
+    builddeps:
+      - *pinned_go
+      - gcc-multilib
+    post-cache:
+      - export GOPATH=/cfsetup_build/
+      - export GOOS=linux
+      - export GOARCH=386
+      - make release
   release-windows-amd64:
     build_dir: *build_dir
     builddeps:
@@ -86,6 +87,9 @@ stretch: &stretch
       - export GOPATH=/cfsetup_build/
       - export GOOS=linux
       - export GOARCH=amd64
+      - sudo chown -R $(whoami) /cfsetup_build/
+      - go get github.com/BurntSushi/go-sumtype
+      - export PATH="$GOPATH/bin:$PATH"
       - make test
 
 jessie: *stretch