fix: support gcc-4.9.1

Signed-off-by: Philippe Coval <rzr@gna.org>
build: try to use /usr/share/autoconf-archive if present

Signed-off-by: Philippe Coval <rzr@gna.org>
packaging: Intial packaging for debian project

Signed-off-by: Philippe Coval <rzr@gna.org>
packaging: debian: make buildable form upstream git

Signed-off-by: Philippe Coval <rzr@gna.org>
packaging: debian: adapt to debian-7.0 and drop patches

Signed-off-by: Philippe Coval <rzr@gna.org>
packaging: debian: 0

Signed-off-by: Philippe Coval <rzr@gna.org>