Re-implement img npot support in HC.

Change-Id: Iac56ec54e46c998ec14f71d8e85eccdc5fb3aa91
diff --git a/libs/rs/rsContext.h b/libs/rs/rsContext.h
index df275bc..9f94f26 100644
--- a/libs/rs/rsContext.h
+++ b/libs/rs/rsContext.h
@@ -205,6 +205,7 @@
     mutable const ObjectBase * mObjHead;
 
     bool ext_OES_texture_npot() const {return mGL.OES_texture_npot;}
+    bool ext_GL_IMG_texture_npot() const {return mGL.GL_IMG_texture_npot;}
     bool ext_GL_NV_texture_npot_2D_mipmap() const {return mGL.GL_NV_texture_npot_2D_mipmap;}
     float ext_texture_max_aniso() const {return mGL.EXT_texture_max_aniso; }
     uint32_t getMaxFragmentTextures() const {return mGL.mMaxFragmentTextureImageUnits;}
@@ -249,6 +250,7 @@
         int32_t mMaxVertexTextureUnits;
 
         bool OES_texture_npot;
+        bool GL_IMG_texture_npot;
         bool GL_NV_texture_npot_2D_mipmap;
         float EXT_texture_max_aniso;
     } mGL;