upgpkg: dhcpcd 6.4.0-1

update to 6.4.0; confirmed to fix FS#39512, previous fix didn't work

git-svn-id: file:///srv/repos/svn-packages/svn@215203 eb2447ed-0c53-47e4-bac8-5bc4a241df78
archrelease: copy trunk to testing-i686, testing-x86_64

git-svn-id: file:///srv/repos/svn-packages/svn@215204 eb2447ed-0c53-47e4-bac8-5bc4a241df78