Add Go dependencies to generated.rb and test_blob.rb

lib/linguist/generated.rb

@@ -56,6 +56,7 @@ module Linguist
       generated_net_specflow_feature_file? ||
       composer_lock? ||
       node_modules? ||
+      go_vendor? ||
       godeps? ||
       generated_by_zephir? ||
       minified_files? ||
@@ -280,6 +281,14 @@ module Linguist
       !!name.match(/node_modules\//)
     end
 
+    # Internal: Is the blob part of the Go vendor/ tree,
+    # not meant for humans in pull requests.
+    #
+    # Returns true or false.
+    def go_vendor?
+      !!name.match(/vendor\//)
+    end
+
     # Internal: Is the blob part of Godeps/,
     # which are not meant for humans in pull requests.
     #