Make the behaviour more consistent by using the standard gnome
autogen.sh from https://wiki.gnome.org/Projects/GnomeCommon/Migration

.
This makes autogen correctly behave when NOCONFIGURE is set amongst
other things.

Also remove configure,{README,INSTALL}{.in,} from EXTRA_DIST and leave it up to
autofoo to import a standard INSTALL file.

Reviewed-by: Justin Kim <justin.kim@collabora.com>
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D2063