add focusgrab test

this test demonstrates one of the more annoying aspects of x11 focus

src/tests/focusgrab.c

@@ -0,0 +1,22 @@
+#include <Ecore.h>
+#include <Ecore_Evas.h>
+
+static Eina_Bool
+_focus(Ecore_Evas *ee)
+{
+   ecore_evas_focus_set(ee, 1);
+   return 1;
+}
+
+int
+main(void)
+{
+   Ecore_Evas *ee;
+
+   ecore_evas_init();
+   ee = ecore_evas_new(NULL, 0, 0, 200, 200, NULL);
+   ecore_evas_show(ee);
+   ecore_timer_add(3.0, (Ecore_Task_Cb)_focus, ee);
+   ecore_main_loop_begin();
+   return 0;
+}