patch 7.4.2189
Problem:    Cannot detect encoding in a fifo.
Solution:   Extend the stdin way of detecting encoding to fifo.  Add a test
            for detecting encoding on stdin and fifo. (Ken Takata)
diff --git a/src/Makefile b/src/Makefile
index be2f31b..e15df1b 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2114,6 +2114,7 @@
 	test_signs \
 	test_sort \
 	test_startup \
+	test_startup_utf8 \
 	test_stat \
 	test_statusline \
 	test_syn_attr \