LP#1207529: Make sure $PATH includes /openils/bin when configuring

https://bugs.launchpad.net/evergreen/+bug/1207529

Signed-off-by: alzr <aleksey.lazar@gmail.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>

Conflicts:
	docs/installation/server_upgrade.txt
LP#1207529: Add /openils assumption note

Signed-off-by: alzr <aleksey.lazar@gmail.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>