Fix .gitattributes rules that should be recursive

These are currently incorrect according to the gitattributes(5) and
gitignore(5) man pages. However, it seems github ended up treating them
as we intended due to a bug until recently when that bug was fixed.
e2cc02717eIsaac Freund committed on 4/19/2021, 8:55:12 PM· committed by Andrew Kelleyparentd605f02
1 file changedLine totals unavailable