patch 9.0.1613: some make output gets picked up by 'errorformat'

Problem:    Some make output gets picked up by 'errorformat'.
Solution:   Ignore make output by default. (Gregory Anders, closes #12481)
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 79c1692..7e4a048 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -1200,7 +1200,7 @@
     "Xtestfile", line 6 col 19; this is an error
     gcc -c -DHAVE_CONFIsing-prototypes -I/usr/X11R6/include  version.c
     Xtestfile:9: parse error before `asd'
-    make: *** [vim] Error 1
+    make: *** [src/vim/testdir/Makefile:100: test_quickfix] Error 1
     in file "Xtestfile" linenr 10: there is an error
 
     2 returned