[cogl] Update cogl.symbols

[Chun-wei Fan <fanchunwei src gnome org>]

commit 2059d2dee03d9b748dca20d8b73ae6a4acc5ea0b
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Feb 15 22:50:09 2012 +0800

    Update cogl.symbols
    
    Add cogl_pipline_set_layer_null_texture... which was just added to the COGL
    API
    
    Checked with Neil Roberts <neil linux intel com> on IRC.

 cogl/cogl.symbols |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/cogl/cogl.symbols b/cogl/cogl.symbols
index 8e52e92..5483822 100644
--- a/cogl/cogl.symbols
+++ b/cogl/cogl.symbols
@@ -653,6 +653,7 @@ cogl_pipeline_set_layer_combine
 cogl_pipeline_set_layer_combine_constant
 cogl_pipeline_set_layer_filters
 cogl_pipeline_set_layer_matrix
+cogl_pipeline_set_layer_null_texture
 cogl_pipeline_set_layer_point_sprite_coords_enabled
 cogl_pipeline_set_layer_texture
 cogl_pipeline_set_layer_wrap_mode