This extends the support to generate all the GDK Visual Studio projects, which
include GDK, GDK-Broadway and broadwayd, in addition to GDK-Win32. The rule
to regenerate the GDK-Win32 project is now changed to regenerate all GDK
projects, with or without EGL support in GDK-Win32.
Also, remove extraneous blank spaces in win32/vs10/broadwayd.vcxprojin to avoid
errors when generating the full VS2010+ broadwayd Visual Studio projects with
this update.
Use inference rules and re-group things a bit, to make things cleaner and
clearer.
b28f2094ce