libpkg: Fix the use of %{....%} modifiers with '%t' timestamp option
libpkg: Fix the use of %{....%} modifiers with '%t' timestamp option

Open343/pkg,skoef/pkg,skoef/pkg,junovitch/pkg,khorben/pkg,khorben/pkg,en90/pkg,khorben/pkg,junovitch/pkg,en90/pkg,Open343/pkg