complete-run: pass outdir (not only logpath) to activate_i3()

testcases/lib/i3test.pm

@@ -433,6 +433,7 @@ sub launch_with_config {
         unix_socket_path => "$tmp_socket_path-activation",
         display => $ENV{DISPLAY},
         configfile => $tmpfile,
+        outdir => $ENV{OUTDIR},
         logpath => $ENV{LOGPATH},
         cv => $cv,
     );