patch 8.1.0887: the 'l' flag in :subsitute is sticky

Problem:    The 'l' flag in :subsitute is sticky.
Solution:   Reset the flag. (Dominique Pelle, closes #3925)
diff --git a/src/version.c b/src/version.c
index aa17e0a..94825f8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    887,
+/**/
     886,
 /**/
     885,