patch 8.0.1336: cannot use imactivatefunc() unless compiled with +xim

Problem:    Cannot use imactivatefunc() unless compiled with +xim.
Solution:   Allow using imactivatefunc() when not compiled with +xim.
            (Yasuhiro Matsumoto, closes #2349)
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index d9ff056..df79e9a 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -115,6 +115,7 @@
 	    test_highlight.res \
 	    test_history.res \
 	    test_hlsearch.res \
+	    test_iminsert.res \
 	    test_increment.res \
 	    test_increment_dbcs.res \
 	    test_ins_complete.res \