Increase the maximum token length in the preprocessor to be 1024, to comply with the GLSL ES 3 specification.

TRAC #23077

Signed-off-by: Shannon Woods
Signed-off-by: Geoff Lang
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2349 736b8ea6-26fd-11df-bfd4-992fa37f6226