Merge branch 'jt/reset-grafts-when-resetting-shallow'

When "shallow" information is updated, we forgot to update the
in-core equivalent, which has been corrected.

* jt/reset-grafts-when-resetting-shallow:
  shallow: reset commit grafts when shallow is reset

submodule.c

@@ -22,6 +22,7 @@
 #include "parse-options.h"
 #include "object-store.h"
 #include "commit-reach.h"
+#include "shallow.h"
 
 static int config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
 static int initialized_fetch_ref_tips;