Fix GIR scanning for srcdir != builddir
Fix GIR scanning for srcdir != builddir

Add the builddir to the include path so atk/atkobject.h is found.

GNOME/at-spi2-core,GNOME/at-spi2-core,GNOME/at-spi2-core,Distrotech/atk,Distrotech/atk,Distrotech/atk