cbfstool: Update LZMA encoder to LZMA SDK 9.12

This removes almost all C++ code (except the wrapper)

Change-Id: I0f84070e3b6dc57c98d49a53150a140479b3221f
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1799
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

util/cbfstool/lzma/ORIGIN

@@ -0,0 +1,8 @@
+The contents of this directory are extracted from
+the official LZMA SDK, version 9.12, for the use in
+mkcromfs (cromfs 1.5.10.1).
+
+However, cromfs does not include all files from that
+archive. Basically, only those which are required in
+compiling cromfs, plus a few text files.
+