Add set for opaque and depth textures

ScriptableRenderPipeline/LightweightPipeline/LWRP/Data/LightweightPipelineAsset.cs

         public bool RequireDepthTexture
         {
             get { return m_RequireDepthTexture; }
+            set { m_RequireDepthTexture = value; }
         }
 
         public bool RequireSoftParticles
         public bool RequireOpaqueTexture
         {
             get { return m_RequireOpaqueTexture; }
+            set { m_RequireOpaqueTexture = value; }
         }
 
         public TextureScale OpaqueTextureScale