[milo] build_source -> buildSource.

milo/buildsource/swarming/buildinfo_test.go

 // Copyright 2017 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package swarming
 
 import (
         "fmt"
         "testing"
 
@@ skipping 229 matching lines @@
                 }
 
                 for _, tc := range failures {
                         Convey(fmt.Sprintf("Failes to parse %q / %q (%s)", tc.taskID, tc.tryNumber, tc.err), func() {
                                 _, err := getRunID(tc.taskID, tc.tryNumber)
                                 So(err, ShouldErrLike, tc.err)
                         })
                 }
         })
 }