xchat: get recipe to a buildable state

  - add inherit for autotools-brokensep workaround
  - rework autotools config
  - add patch for automake foreign
  - add PACKAGECONFIG option for python interface
  - move dbus to RDEPEND, as dbus-glib header is required for build

Upstream-Status: Inappropriate (no upstream)

Signed-off-by: Stephen Arnold <stephen.arnold42@gmail.com>
vala-terminal: add inherit for pkgconfig to fix configure error

Upstream-Status: Inappropriate (recipe fix)

Signed-off-by: Stephen Arnold <stephen.arnold42@gmail.com>