Add gzip bintool to binman to support on-the-fly compression of Linux kernel images and FPGA bitstreams. The SPL basic fitImage implementation supports only gzip decompression. Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com> Reviewed-by: Simon Glass <sjg@chromium.org> Rename the module and support this, since gzip.py is a system module: Signed-off-by: Simon Glass <sjg@chromium.org>