tools-leaf: Import statically linked 7z

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

Change-Id: If20973a06aa381fc5bd28e3b65e6df7a398dba4f
diff --git a/linux-x86/bin/7z b/linux-x86/bin/7z
new file mode 100755
index 0000000..8c10404
--- /dev/null
+++ b/linux-x86/bin/7z
Binary files differ