tools/check_patch.py: Accept multiple patchwork patch IDs

Different from github, patches on patchwork are individual
and there's no concept of a patchset. Therefore, verifying
a large patchset is a painful process.

Make it easier by allowing to specify several IDs, separated
by comma.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
virt: Add get_primary_serial functions for VMXML class.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
virt: Add ttyconsole function for virsh module.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
virt-libvirt: Add configuration for virsh ttyconsole test.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
virt-libvirt: Add test module of virsh ttyconsole.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>