If you:
bitbake sed-native
bitbake libtool-cross
then libtool-cross has SED="/path/to/sysroot/sed" which is incorrect. If that
is reused from sstate or sed-native is cleaned, the build will fail.
This patch simply sets sed to be "sed" since we're not on systems where
the sed from PATH is broken.
(From OE-Core rev: 65accc9a8526ed659b0a6a75fa9986fd7e6819b2)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>