patch 8.1.0827: missing dependency in Makefile

Problem:    Missing dependency in Makefile.
Solution:   Add dependency from autocmd.o on auto/osdef.h
diff --git a/src/Makefile b/src/Makefile
index 2c409f0..3f54184 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -3383,7 +3383,7 @@
  proto/gui_beval.pro structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h \
  proto.h globals.h farsi.h arabic.h
 objects/autocmd.o: autocmd.c vim.h protodef.h auto/config.h feature.h \
- os_unix.h os_mac.h ascii.h keymap.h term.h macros.h option.h beval.h \
+ auto/osdef.h os_unix.h os_mac.h ascii.h keymap.h term.h macros.h option.h beval.h \
  structs.h regexp.h gui.h alloc.h ex_cmds.h spell.h proto.h globals.h \
  farsi.h arabic.h
 objects/beval.o: beval.c vim.h protodef.h auto/config.h feature.h os_unix.h \
diff --git a/src/version.c b/src/version.c
index 5510522..39a4f8f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    827,
+/**/
     826,
 /**/
     825,