libvirt: Disable polkit driver when there is no x11
libvirt: Disable polkit driver when there is no x11

To avoid having the default build of libvirt depend on virtual/x11
through polkit and consolekit, check for x11 in DISTRO_FEATURES before
enabling the polkit support in the default PKG_CONFIG.

Signed-off-by: Jonas Eriksson <dc0621c456d39f2e60985f0f5ca3eb277749d41d@enea.com>
Acked-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>
Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

cjp256/meta-virtualization,errordeveloper/oe-meta-virtualization,cardoe/meta-virtualization,lgirdk/meta-virtualization,cjp256/meta-virtualization,cardoe/meta-virtualization,lgirdk/meta-virtualization,cardoe/meta-virtualization,fbertux/meta-virtualization,lgirdk/meta-virtualization,rcwoolley/meta-virtualization,fbertux/meta-virtualization,fbertux/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,cjp256/meta-virtualization