Put some stuff in the gfx plugins into namespaces, so that the symbols won't collide if someone decides to merge the gfx plugins into dolphin too. still more things left to do though.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6972 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX11/Src/PixelShaderCache.h

@@ -24,6 +24,8 @@
 class PIXELSHADERUID;
 enum DSTALPHA_MODE;
 
+namespace DX11 {
+
 class PixelShaderCache
 {
 public:
@@ -58,3 +60,5 @@ private:
 	static PSCache PixelShaders;
 	static const PSCacheEntry* last_entry;
 };
+
+}  // namespace DX11