tools-leaf: Import statically linked 7z

* From https://www.7-zip.org/a/7z2107-linux-x64.tar.xz

Change-Id: If20973a06aa381fc5bd28e3b65e6df7a398dba4f
1 file changed
tree: be1e3a2d85d28a095d8813faf99810d83c04c69a
  1. linux-x86/