Update cube texture borders when dirty.

Change-Id: Ic259645ab7950b0b2800964bbfd14f3294de50b1
Reviewed-on: https://swiftshader-review.googlesource.com/14288
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>

src/Renderer/Surface.cpp

diff --git a/src/Renderer/Surface.cpp b/src/Renderer/Surface.cpp
index 3533d25..12d990a 100644
--- a/src/Renderer/Surface.cpp
+++ b/src/Renderer/Surface.cpp
@@ -1249,7 +1249,7 @@
 		stencil.lock = LOCK_UNLOCKED;
 		stencil.dirty = false;
 
-		dirtyMipmaps = true;
+		dirtyContents = true;
 		paletteUsed = 0;
 	}
 
@@ -1302,7 +1302,7 @@
 		stencil.lock = LOCK_UNLOCKED;
 		stencil.dirty = false;
 
-		dirtyMipmaps = true;
+		dirtyContents = true;
 		paletteUsed = 0;
 	}
 
@@ -1367,7 +1367,7 @@
 		case LOCK_WRITEONLY:
 		case LOCK_READWRITE:
 		case LOCK_DISCARD:
-			dirtyMipmaps = true;
+			dirtyContents = true;
 			break;
 		default:
 			ASSERT(false);
@@ -1446,7 +1446,7 @@
 		case LOCK_WRITEONLY:
 		case LOCK_READWRITE:
 		case LOCK_DISCARD:
-			dirtyMipmaps = true;
+			dirtyContents = true;
 			break;
 		default:
 			ASSERT(false);
@@ -3649,14 +3649,14 @@
 		return renderTarget;
 	}
 
-	bool Surface::hasDirtyMipmaps() const
+	bool Surface::hasDirtyContents() const
 	{
-		return dirtyMipmaps;
+		return dirtyContents;
 	}
 
-	void Surface::cleanMipmaps()
+	void Surface::markContentsClean()
 	{
-		dirtyMipmaps = false;
+		dirtyContents = false;
 	}
 
 	Resource *Surface::getResource()