Instead of patching out the build of optional packages, we can just use
the tcl-core tarball which is identical except it doesn't include the
packages.
(From OE-Core rev: fed52484e60cbaaa19c30959bdbf70c9bdd4d39b)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>