python: Fix Create*WithFiles filefd passing

Commit d76227be added functions virDomainCreateWithFiles and
virDomainCreateXMLWithFiles, but there was a little piece missing in
python bindings.  This patch fixes proper passing of file descriptors
in the overwrites of these functions.

python/libvirt-override.c

@@ -7157,6 +7157,8 @@ libvirt_virDomainCreateWithFiles(PyObject *self ATTRIBUTE_UNUSED, PyObject *args
 
         if (libvirt_intUnwrap(pyfd, &fd) < 0)
             goto cleanup;
+
+        files[i] = fd;
     }
 
     LIBVIRT_BEGIN_ALLOW_THREADS;
@@ -7201,6 +7203,8 @@ libvirt_virDomainCreateXMLWithFiles(PyObject *self ATTRIBUTE_UNUSED, PyObject *a
 
         if (libvirt_intUnwrap(pyfd, &fd) < 0)
             goto cleanup;
+
+        files[i] = fd;
     }
 
     LIBVIRT_BEGIN_ALLOW_THREADS;