Fixed HDLoop test scene "Four Shapes" heightmap (was sRGB and wrong format)

SampleScenes/HDTest/GraphicTest/Common/Textures/FourShapesReliefHeightmap.tga.meta

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 guid: 870243a1ef675dd4cac0433df1aa80a3
-timeCreated: 1484821420
-licenseType: Pro
-  serializedVersion: 4
+  externalObjects: {}
+  serializedVersion: 5
-    sRGBTexture: 1
+    sRGBTexture: 0
+    mipMapsPreserveCoverage: 0
+    alphaTestReferenceValue: 0.5
     mipMapFadeDistanceStart: 1
     mipMapFadeDistanceEnd: 3
   bumpmap:
   alphaUsage: 1
   alphaIsTransparency: 0
   spriteTessellationDetail: -1
-  textureType: 0
+  textureType: 10
+  singleChannelComponent: 1
-  - buildTarget: DefaultTexturePlatform
+  - serializedVersion: 2
+    buildTarget: DefaultTexturePlatform
+    resizeAlgorithm: 0
     textureFormat: -1
     textureCompression: 1
     compressionQuality: 50
-  - buildTarget: Standalone
+    androidETC2FallbackOverride: 0
+  - serializedVersion: 2
+    buildTarget: Standalone
-    textureFormat: 26
+    resizeAlgorithm: 0
+    textureFormat: -1
-    overridden: 1
-  - buildTarget: iPhone
+    overridden: 0
+    androidETC2FallbackOverride: 0
+  - serializedVersion: 2
+    buildTarget: iPhone
+    resizeAlgorithm: 0
     textureFormat: -1
     textureCompression: 1
     compressionQuality: 50
-  - buildTarget: tvOS
+    androidETC2FallbackOverride: 0
+  - serializedVersion: 2
+    buildTarget: tvOS
+    resizeAlgorithm: 0
     textureFormat: -1
     textureCompression: 1
     compressionQuality: 50
-  - buildTarget: PS4
+    androidETC2FallbackOverride: 0
+  - serializedVersion: 2
+    buildTarget: PS4
+    resizeAlgorithm: 0
     textureFormat: -1
     textureCompression: 1
     compressionQuality: 50
-  - buildTarget: Windows Store Apps
+    androidETC2FallbackOverride: 0
+  - serializedVersion: 2
+    buildTarget: Windows Store Apps
+    resizeAlgorithm: 0
     textureFormat: -1
     textureCompression: 1
     compressionQuality: 50
-  - buildTarget: WebGL
+    androidETC2FallbackOverride: 0
+  - serializedVersion: 2
+    buildTarget: WebGL
+    resizeAlgorithm: 0
     textureFormat: -1
     textureCompression: 1
     compressionQuality: 50
+    androidETC2FallbackOverride: 0
+    physicsShape: []
+    bones: []
+    spriteID: 
+    vertices: []
+    indices: 
+    edges: []
+    weights: []
   spritePackingTag: 
   userData: 
   assetBundleName: