It provides udev, but doesn't install udev.pc, which causes other
recipes failed to figure out udevdir.
Fixed when systemd in DISTRO_FEATURES:
$ bitbake pcmciautils (or btrfs-tools):
Package udev was not found in the pkg-config search path.
Perhaps you should add the directory containing `udev.pc'
to the PKG_CONFIG_PATH environment variable
No package 'udev' found
Their udev rules file may not be installed according to each pkg's
implementation.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
