This avoids the following warning:
warning: Ignoring invalid regex %{_docdir}
when runing `rpmdeps -R <file>`, since %{_docdir} is only defined when
parsing a spec file.
(From OE-Core rev: c128e19d25f2015ce1bed13b423ac0d6e619ef5e)
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>