thirdparty: Create universal unzip binary/script for upcoming autopatcher
libmbp: Reorganize source files a little bit
patchinfos: Improve comments in Sample.xml
thirdparty: Use base64 encoded, xz compressed version of minizip
libmbp: Add new UnzipPatcher autopatcher

UnzipPatcher handles the patching of scripts to use miniunzip (from
zlib), which is necessary because most busybox binaries on Android are
not compiled with support for data descriptors, which are used in
libarchive's output zip files.
patchinfos: Use the new UnzipPatcher for SuperSU