gbuildification of expat

[d.ostrovsky at idaia.de]

Hi,

during gbuildification of expat special treatment is needed to produce 64
bit libs for windows, because 64 bit expat is used there for 64 bit  
shell extensions:

https://gerrit.libreoffice.org/#/c/867/

To test it we need 64 bit OS and VS Professional.
While i tested gbuildified expat itself on windows server 2008 64 bit
and VS Prof. 2010, i am failing to compile the whole LO:

Error in cli_ure:
CliAssembly.mk:76 assembly version not set
I have no idea why, though.

I don't expect that someone going to review or test it
and am going to merge it in the next days.

Regards
David