test: xkeyboard-config: invoke the python3 command (#120)

python3 is always python3, but python could be python2 in some cases. Or just
missing (e.g. RHEL8).

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/test/xkeyboard-config-test.py.in b/test/xkeyboard-config-test.py.in
index 9241ee2..26d3a30 100755 (executable)
--- a/test/xkeyboard-config-test.py.in
+++ b/test/xkeyboard-config-test.py.in
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import argparse
 import sys
 import subprocess