Wrc patch

Hi,

This patch is an answer for "Call for volunteers".
I hope it fixes : "wrc fails on preprocessed files"
   #115: http://wine.codeweavers.com/bugzilla/show_bug.cgi?id=115

Maciek

Changelog
* tools/wrc/ppy.y
Maciek Kaliszewski 
Added better GCC-style #line directive handling.