[tex-live] updates to texlive/trunk/Build/source

[Jonathan Kew]

I have just checked in a bunch of updates to bring XeTeX up to  
version 0.997. This also involved adding a new library (graphite), a  
major update to the icu-xetex library, and adjustments to the  
configure scripts, etc.

Therefore, although I've run successful builds on Darwin (PPC and  
i386) and Linux (i386), there's a good chance that we'll see some  
build problems somewhere as a result of all the changes. So anyone  
interested is invited to try building the latest source from trunk,  
and report any problems so that we can get them fixed promptly.

Jonathan