wxwidgets: add 2.9.0 and clean up recipes

wxwidgets: add 2.9.0 and clean up recipes

- Add wxwidget-2.9.0 include with derived rather than hardcoded lib and
   config script names (depends on debug and charset configure flags)
 - Use regular expression for LEAD_SONAME rather than hardcoded name.
 - Fix autoconf issue where configure could not find staging root.
 - Use INC_PR.

 - Add wxwidgets-2.9.0 (unicode)
 - Add wxwidgets-ansi-2.9.0 (non-unicode)
 - Add wxwidgets-opengl-2.9.0 (unicode, opengl)

Signed-off-by: Johan Hovold <johan.hovold@lundinova.se>
Signed-off-by: Marco Cavallini <m.cavallini@koansoftware.com>