lib/berkeley-db-1.xx: Update, sets default page size to 4096.

This both good default for 4096 and makes less chance to see overflow page
issues.

berkeley-db-1.xx @ 78a47879

-Subproject commit 2328ab24e8e538b1cf443dad6b4a635d6cf6620f
+Subproject commit 78a4787948bb80cbfafcfd7910f95f61a4dd0d4c