[chore] add os and architecture to the release

Author: icepuma

.travis.yml

@@ -7,12 +7,13 @@ before_install:
   - go get github.com/tools/godep
 script:
   - go install
-  - CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o goat .
+  - CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o goat-linux-amd64 .
 deploy:
   provider: releases
   api_key: $GITHUB_TOKEN
-  file: goat
+  file:
+    - goat-linux-amd64
   skip_cleanup: true
   on:
     tags: true
-   
+