Re: Issue 1496 in lilypond: Update Pango to 1.28.3

[lilypond]

Comment #1 on issue 1496 by pnorcks: Update Pango to 1.28.3
http://code.google.com/p/lilypond/issues/detail?id=1496

tools::pango checks out okay, but I haven't built any of the installers yet.

To clarify, this patch bumps Pango from 1.26.0 to 1.28.3.  This has the  
following effects (that I've noticed):

1) Improvements for shaping Khmer script
2) Improvements for shaping Arabic script