Rename renderer namespace to rx

Trac #21999
Author: Shannon Woods
Signed-off-by: Daniel Koch

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1379 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/Renderer.h b/src/libGLESv2/renderer/Renderer.h
index 493c3ea..8f3c847 100644
--- a/src/libGLESv2/renderer/Renderer.h
+++ b/src/libGLESv2/renderer/Renderer.h
@@ -37,7 +37,7 @@
 class Display;
 }
 
-namespace renderer
+namespace rx
 {
 
 struct ConfigDesc