Revert "Remove GLTrace support"

This reverts commit 5bf6f3b5bf06e04a742bde8d40409d3c9e434c05.

Change-Id: I25a2d9b4a4b219cb76b405db1f68997519361cd6
diff --git a/opengl/libs/tools/genfiles b/opengl/libs/tools/genfiles
index feef318..a4a1958 100755
--- a/opengl/libs/tools/genfiles
+++ b/opengl/libs/tools/genfiles
@@ -40,6 +40,8 @@
         | awk -F, '!_[$2]++' \
             > ../entries.in
 
+./gltracegen ../entries.in >../trace.in
+
 cat ../../include/GLES/gl.h \
     ../../include/GLES/glext.h \
     ../../include/GLES2/gl2ext.h \