fix appveyor and shipping build scripts

appveyor.yml

@@ -21,8 +21,8 @@ install:
   - appveyor DownloadFile https://storage.googleapis.com/golang/go%GOVERSION%.windows-amd64.zip
   - 7z x go%GOVERSION%.windows-amd64.zip -y -oC:\ > NUL
   - go version
-  - go get v2ray.com/core/...
-  - go get v2ray.com/ext/...
+  - go get -t v2ray.com/core/...
+  - go get -t v2ray.com/ext/...
 
 build_script:
   - go build v2ray.com/core/main

shippable.yml

@@ -15,6 +15,6 @@ build:
     - tar -C /usr/local -xzf golang.tar.gz
     - export PATH=$PATH:/usr/local/go/bin
     - export GOPATH=/v2ray
-    - go get v2ray.com/core/...
-    - go get v2ray.com/ext/...
+    - go get -t v2ray.com/core/...
+    - go get -t v2ray.com/ext/...
     - go test -p 1 -v v2ray.com/core/...