It fails to run g-ir-scanner from package gobject-introspection that
missing python modules 'xml' and 'pickle'. Add them to rdepends.
(From OE-Core rev: fa1bad8d96f7f0b8bf5fd2b85ad10b783ff2d303)
Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>