Update build pipeline for generate artifacts for release (microsoft#60)

* remove release yml file

* update build pipeline for release

Author: kaibocai

eng/templates/build.yml

@@ -31,4 +31,10 @@ jobs:
             inputs:
                 SourceFolder: $(System.DefaultWorkingDirectory)
                 Contents: "*.tgz"
-                TargetFolder: $(Build.ArtifactStagingDirectory)
+                TargetFolder: $(Build.ArtifactStagingDirectory)/buildoutputs
+          - task: PublishPipelineArtifact@1
+            name: PublishPipelineArtifact1
+            displayName: 'Publish Artifact: Build Outputs'
+            inputs:
+              ArtifactName: BuildOutputs
+              TargetPath: $(Build.ArtifactStagingDirectory)