build: Fix uninstall when WITH_APPARMOR_PROFILES is defined

When libvirt configuration includes '--with-apparmor-profiles', the
make uninstall target fails

make[1]: Entering directory '/home/jim/upstream/libvirt/examples'
 ( cd '/etc/apparmor.d//abstractions' && rm -f libvirt-qemu libvirt-lxc )
 ( cd '/etc/apparmor.d/' && rm -f usr.lib.libvirt.virt-aa-helper usr.sbin.libvirtd )
make[1]: *** No rule to make target 'uninstall-apparmor-local', needed by
'uninstall-local'.  Stop.

Add missing 'uninstall-apparmor-local' target to the examples Makefile.am.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

examples/Makefile.am

@@ -96,6 +96,10 @@ install-apparmor-local:
 		'usr.lib.libvirt.virt-aa-helper'" \
 		>"$(APPARMOR_LOCAL_DIR)/usr.lib.libvirt.virt-aa-helper"
 
+uninstall-apparmor-local:
+	rm -f "$(APPARMOR_LOCAL_DIR)/usr.lib.libvirt.virt-aa-helper"
+	rmdir "$(APPARMOR_LOCAL_DIR)" || :
+
 INSTALL_DATA_LOCAL += install-apparmor-local
 UNINSTALL_LOCAL += uninstall-apparmor-local
 endif WITH_APPARMOR_PROFILES