Update test shaders

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Add.ShaderGraph.meta

 fileFormatVersion: 2
 guid: 6b526455b2500458f9e378534990c26c
-timeCreated: 1504702289
-licenseType: Pro
 ShaderImporter:
   externalObjects: {}
   defaultTextures: []

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/AddSubGraph.ShaderGraph.meta

 fileFormatVersion: 2
 guid: f20399762b45e564fbe7b65ab460a5b6
-timeCreated: 1504702299
-licenseType: Pro
 ShaderImporter:
   externalObjects: {}
   defaultTextures: []

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Cracks.ShaderGraph.meta

 fileFormatVersion: 2
 guid: a8cb0d181b460aa4bac2693ce3bfc1ad
-timeCreated: 1504881039
-licenseType: Pro
-  nonModifiableTextures:
-  - Texture2D_Texture2D_CF0DB0B2_Uniform: {fileID: 2800000, guid: 7296f51323ae9485a9c834c4e3d722ed,
-      type: 3}
-  - Texture2D_Texture2D_D8FD66BB_Uniform: {fileID: -931156776, guid: b69a7e88e13e24260acb38513f619ff2,
-      type: 3}
-  - Texture2D_Texture2D_DF8FC6BF_Uniform: {fileID: 2800000, guid: 9d64a9e7ca6864704ae6b8ca7afc9d85,
-      type: 3}
+  nonModifiableTextures: []
   userData: 
   assetBundleName: 
   assetBundleVariant: 

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/Multiply.ShaderGraph.meta

 fileFormatVersion: 2
 guid: 3b1382b7bb78a4162b89a4f706240f08
-timeCreated: 1504702329
-licenseType: Pro
 ShaderImporter:
   externalObjects: {}
   defaultTextures: []

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/SplitCombine.ShaderGraph.meta

 fileFormatVersion: 2
 guid: 3782c62dd61732042aed83e579a22e5f
-timeCreated: 1504702334
-licenseType: Pro
-  - Texture2D_Texture2D_FCC444C7_Uniform: {fileID: 2800000, guid: 9c50a18d04437449b86568cfcbb668a7,
-      type: 3}
+  - Texture_BBB67AA7: {fileID: 2800000, guid: 618126695341ad844ac048b062fd2688, type: 3}
   userData: 
   assetBundleName: 
   assetBundleVariant: 

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Testing/IntegrationTests/Graphs/TextureSample.ShaderGraph.meta

 fileFormatVersion: 2
 guid: 0bf1c65d8d6ab4c1f8476fb1cf9eb20a
-timeCreated: 1504702365
-licenseType: Pro
-  - Texture2D_Texture2D_ED131035_Uniform: {fileID: 2800000, guid: 330f42016073a97418a4aae5517e32c8,
-      type: 3}
+  - Texture_AD00096F: {fileID: 2800000, guid: 55fd692de65e703408cbda23b0eae8d0, type: 3}
   userData: 
   assetBundleName: 
   assetBundleVariant: