Set policycoreutils package name for RHEL/CentOS 8

In RHEL/Centos 8 policycoreutils-python is called policycoreutils-python-utils.
Fix bindep file to match the new name.
Change-Id: I47bd71f5aca6d870134a43e49646814151ab4524

bindep.txt

@@ -7,4 +7,5 @@ libffi-dev [platform:dpkg]
 libffi-devel [platform:rpm]
 libssl-dev [platform:dpkg test]
 openssl-devel [platform:rpm test]
-policycoreutils-python [platform:rpm test]
+policycoreutils-python [platform:rpm test !platform:rhel-8 !platform:centos-8 !platform:fedora]
+policycoreutils-python-utils [platform:rpm test !platform:rhel-7 !platform:centos-7]