pseudo: package the var/pseudo directory.

pseudo: package the var/pseudo directory.

Fixed the "not shipped" packaging warnings.

WARNING: For recipe pseudo-nativesdk, the following files/directories
were installed but not shipped in any package:
WARNING:   /opt/poky/1.1+snapshot/sysroots/x86_64-pokysdk-linux/usr/var
WARNING:
/opt/poky/1.1+snapshot/sysroots/x86_64-pokysdk-linux/usr/var/pseudo

Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>