Updated pipeline asset to a new version.

Tests/GraphicsTests/RenderPipeline/LightweightPipeline/LightweightPipelineAsset.asset

   m_Script: {fileID: 11500000, guid: bf2edee5c58d82540a51f03df9d42094, type: 3}
   m_Name: LightweightPipelineAsset
   m_EditorClassIdentifier: 
-  kAssetVersion: 1
+  kAssetVersion: 2
   m_MaxPixelLights: 4
   m_SupportsVertexLight: 0
   m_RequireDepthTexture: 0
   m_ShadowCascades: 2
   m_Cascade2Split: 0.25
   m_Cascade4Split: {x: 0.067, y: 0.2, z: 0.467}
-  m_DefaultShader: {fileID: 4800000, guid: 933532a4fcc9baf4fa0491de14d08ed7, type: 3}
-  m_ResourceAsset: {fileID: 11400000, guid: c8afc0a27fb8c0b4da18151c689a1082, type: 2}

Tests/GraphicsTests/RenderPipeline/LightweightPipeline/LightweightPipelineAsset.asset.meta

 fileFormatVersion: 2
 guid: e6987eea1dd29074597d54ed91a54a26
-timeCreated: 1489068733
-licenseType: Pro
+  externalObjects: {}
   mainObjectFileID: 11400000
   userData: 
   assetBundleName: