patch 7.4.2153
Problem:    GUI test isn't testing much.
Solution:   Turn into a new style test.  Execute a shell command.
diff --git a/src/Makefile b/src/Makefile
index 6d49e90..273fc9e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2039,7 +2039,7 @@
 	test_wordcount \
 	test_writefile \
 	test2 test3 test4 test5 test6 test7 test8 test9 \
-	test11 test12 test13 test14 test15 test16 test17 test18 test19 \
+	test11 test12 test13 test14 test15 test17 test18 test19 \
 	test20 test21 test22 test23 test24 test25 test26 test27 test28 test29 \
 	test30 test31 test32 test33 test34 test36 test37 test38 test39 \
 	test40 test41 test42 test43 test44 test45 test46 test48 test49 \
@@ -2080,6 +2080,7 @@
 	test_glob2regpat \
 	test_gn \
 	test_goto \
+	test_gui \
 	test_hardcopy \
 	test_help_tagjump \
 	test_history \