xargs 4.1 -> 4.4.2 release script

d4bca56 adds dlls required by git.exe that are missing in branch "msys" .
5c13144 imports the original msys-build-findutils
897b079 based on msys-findutils source package. The patches require reconfigure, but autotools installed in "msys" are too old. See commit message in 0001-fix-build-on-msys-and-reconfigure.patch