bin/dir2ramdisk: new ramdisk
bin/edit: tune e
bin/my-rfa: make my-rfa accept both 'echo hello' and echo hello
bin/replace-bootimage: work on new boot image format
bin/replace-ramdisk: old replace-bootimage
bin/smbcp: new smbcp for working on many files
gcode/misc/mkbootimg.c: my version of mkbootimg

Signed-off-by: Bao Haojun <baohaojun@gmail.com>