eudev: Add missing pkgconfig dependencies

Building eudev from scratch in an sstate build results in configure errors since the pkg-config macros can't be found. Add in a missing pkg-config dependency using the appropriate class to avoid such failures.

index 6270617..8e229fc 100644
@@ -23,7 +23,7 @@ UPSTREAM_CHECK_URI = "https://github.com/gentoo/eudev/releases"

 SRC_URI[md5sum] = "9eb477cc8718db272b5d24dff1126b04"
 SRC_URI[sha256sum] = "37829d37f4beb7e358ca33abc1ad0907d87f917ce157777aeaeebeacae24efdc"
-inherit autotools update-rc.d qemu
+inherit autotools update-rc.d qemu pkgconfig

 EXTRA_OECONF = " \
     --sbindir=${base_sbindir} \