Make faceforward match the conformance test.

TRAC #12252

The conformance test checks the dot product for >= 0.

Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch

Author:    Andrew Lewycky

git-svn-id: https://angleproject.googlecode.com/svn/trunk@276 736b8ea6-26fd-11df-bfd4-992fa37f6226
1 file changed