opensaf: update SRC_URI and install actions

The default configuration for OpenSAF creates /run and /var/lock during
install time.  Tweak the recipe to use ${localstatedir} as other recipes
do, and clean up at the end of do_install.

Swap the hard-coded SRC_URI with ${SOURCEFORGE_MIRROR} while we're at it.

Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>