xfsprogs: 4.14.0 -> 4.19.0

xfsprogs started using icu in bff5d1a4e8df8a23957e5739850754991ad2b9c8, part of v4.16.0

xfsprogs-4.15.0-docdir.patch is needed to avoid cyclic references in the outputs.

./glibc-2.27.patch is no longer necessary as it was included in xfsprogs 8041435de7ed028a27ecca64302945ad455c69a6