test: Introduce chxml2xmltest

Whilst reviewing a patch upstream (that ended up as
v9.0.0-200-g092176e5ec), I realized we don't have a single
xml2xml test for CH driver. Well, introduce the test with one
simple test case for now.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

tests/chxml2xmlin/basic.xml

@@ -0,0 +1,30 @@
+<domain type='kvm'>
+  <name>cloudhypervisor</name>
+  <uuid>4dea22b3-1d52-d8f3-2516-782e98ab3fa0</uuid>
+  <memory unit='KiB'>2097152</memory>
+  <currentMemory unit='KiB'>2097152</currentMemory>
+  <vcpu placement='static'>2</vcpu>
+  <os>
+    <type arch='x86_64'>hvm</type>
+    <kernel>hypervisor-fw</kernel>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/local/bin/cloud-hypervisor</emulator>
+    <disk type='file' device='disk'>
+      <source file='disk.raw'/>
+      <target dev='vda' bus='virtio'/>
+    </disk>
+    <interface type='ethernet'>
+      <mac address='52:54:00:5c:e4:84'/>
+      <model type='virtio'/>
+    </interface>
+    <console type='pty'>
+      <target type='serial' port='0'/>
+    </console>
+  </devices>
+</domain>