autogen.sh: pass --force to autoreconf, quote ORIGDIR
By passing --force autoreconf will update all the aux files, which would
otherwise be ignored if one updates autoconf/automake.
Quote the ORIGDIR variable to prevent fall-outs, when its name contains
space.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
autoconf: Add autogen.sh from Xorg for easier setup from git
The defacto method to rebuild the autotools and run the generated
configure is an autogen.sh script. It is much more discoverable than the
custom `make configure' used here. The Makefile targets are still useful
for creating tarballs, though. This autogen.sh is copied from Xorg.