Enabling gobject-introspection support in gtk3 builds

[David Tardon]

Hi,

On Mon, Sep 14, 2015 at 10:13:47AM +0200, Miklos Vajna wrote:
> Hi,
> 
> On Sun, Sep 13, 2015 at 05:09:57PM +0530, Pranav Kant <pranavk at gnome.org> wrote:
> > That is indeed correct. I have fixed that and updated the patch.
> 
> Thanks, pushed <https://gerrit.libreoffice.org/#/c/18494/> now to master.
> 
> Tinderbox owners: if autogen.sh now fails, please either disable
> gobject-introspection support or install the new build-dependency.

IMHO tools that are not needed for standard build (make && make check)
should not be checked for by default.

D.