import msys-findutils build script

extracted from findutils-4.4.2-2-msys-1.0.13-src.tar from:
https://sourceforge.net/projects/mingw/files/MSYS/Base/findutils/findutils-4.4.2-2/

Signed-off-by: Ilya Basin <basinilya@gmail.com>
Add a release script for xargs 4.4.2

adds '-d' option to xargs

Signed-off-by: Ilya Basin <basinilya@gmail.com>