[sugar] [patch] fix gecko-embed pkgconfig

[Marco Pesenti Gritti]

Robert Staudinger wrote:
> Hi,
>
> the attached patch does away with gecko-embed's hardcoded .pc file and
> adds an autogen'd one instead. So it becomes usable from a c
> application.
>
> The included sample can be built with
> gcc `pkg-config --cflags --libs gtk+-2.0 gecko-embed` -lxul -o
> gecko-embed-test gecko-embed-test.c
> (there seems to be a bug in xulrunner, -lxul is not mentioned in any
> of the installed .pc files)
>
> Ok to commit?
Yeah, please check it in. Thanks!!

Marco