libcap-ng-python: upgrade 0.8.4 -> 0.8.5

Changelog:
https://people.redhat.com/sgrubb/libcap-ng/ChangeLog



 - Remove python global exception handler since it's deprecated
 - Make the utilities link against just built libraries
 - Remove unused macro in cap-ng.h

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>