xchat: update recipe with build/configure fixes

Update recipe with build/configure fixes (rework autotools config,
add patch for separate build dir, add patch for automake foreign,
add PACKAGECONFIG option for python interface, move dbus to RDEPEND,
as dbus-glib header is required for build; the last one is a workaround
for the QA depend warning on more than one dep in PKGCONF).

Upstream-Status: Inappropriate (no more upstream)

Signed-off-by: S. Lockwood-Childs <sjl@vctlabs.com>
Signed-off-by: Steve Arnold <stephen.arnold42@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>