Implemented varying packing TRAC #11736 The OpenGL ES Shading Language 1.00 rev. 17 appendix A section 7 page 111, details how varyings should be packed into generic varying registers. To implement this the HLSL main() function is now generated and appended to the code during link time, where the packing and mapping can happen. Signed-off-by: Shannon Woods Signed-off-by: Daniel Koch Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@282 736b8ea6-26fd-11df-bfd4-992fa37f6226