tests/unit: Constify all Property

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/tests/unit/test-qdev-global-props.c b/tests/unit/test-qdev-global-props.c
index c8862ca..1eb95d2 100644
--- a/tests/unit/test-qdev-global-props.c
+++ b/tests/unit/test-qdev-global-props.c
@@ -46,7 +46,7 @@
     uint32_t prop2;
 };
 
-static Property static_props[] = {
+static const Property static_props[] = {
     DEFINE_PROP_UINT32("prop1", MyType, prop1, PROP_DEFAULT),
     DEFINE_PROP_UINT32("prop2", MyType, prop2, PROP_DEFAULT),
     DEFINE_PROP_END_OF_LIST()