Fix multilib isntall file conflicts for gobject-introspection.
* use multilib_script.bbclass to handle ${bindir}/g-ir-annotation-tool
and ${bindir}/g-ir-scanner
* add configure option to install .gir files to an alternative path and
only set it when multilib is enabled
Signed-off-by: Kai Kang <kai.kang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
