Wrap the new virConnectDomainQemuMonitorEventRegister function
added in libvirt 1.2.3.  This patch copies heavily from
network events (commit 6ea5be0d

) and from event loop callbacks
in libvirt-override.c, since in the libvirt_qemu module, we
must expose top-level functions rather than class members.

* generator.py (qemu_skip_function): Don't generate event code.
(qemuBuildWrappers): Delay manual portion until after imports.
* libvirt-qemu-override.py (qemuMonitorEventRegister)
(qemuMonitorEventDeregister): New file.
* libvirt-qemu-override.c
(libvirt_qemu_virConnectDomainQemuMonitorEventFreeFunc)
(libvirt_qemu_virConnectDomainQemuMonitorEventCallback)
(libvirt_qemu_virConnectDomainQemuMonitorEventRegister)
(libvirt_qemu_virConnectDomainQemuMonitorEventDeregister)
(libvirt_qemu_lookupPythonFunc, getLibvirtQemuDictObject)
(getLibvirtQemuModuleObject): New functions.

Signed-off-by: Eric Blake <eblake@redhat.com>