Fix QEMU test with 1.2.0 help output

The help output for QEMU 1.2.0 changed 'pci-assign' to 'kvm-pci-assign'.
Since the new capabilities code does exact device name matching
instead of substring matching, this caused the capabilities to go
missing.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/qemu/qemu_capabilities.c

@@ -1321,6 +1321,8 @@ static struct qemuCapsObjectTypeProps qemuCapsObjectProps[] = {
       ARRAY_CARDINALITY(qemuCapsObjectPropsVirtioNet) },
     { "pci-assign", qemuCapsObjectPropsPciAssign,
       ARRAY_CARDINALITY(qemuCapsObjectPropsPciAssign) },
+    { "kvm-pci-assign", qemuCapsObjectPropsPciAssign,
+      ARRAY_CARDINALITY(qemuCapsObjectPropsPciAssign) },
     { "scsi-disk", qemuCapsObjectPropsScsiDisk,
       ARRAY_CARDINALITY(qemuCapsObjectPropsScsiDisk) },
     { "ide-drive", qemuCapsObjectPropsIDEDrive,