patch 8.0.1607: --clean loads user settings from .gvimrc

Problem:    --clean loads user settings from .gvimrc.
Solution:   Behave like "-U NONE" was used. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 4531c82..e7e3f49 100644
--- a/src/version.c
+++ b/src/version.c
@@ -767,6 +767,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1607,
+/**/
     1606,
 /**/
     1605,