oe-publish-sdk: drop SDK installer file from published output
We don't really need the SDK installer in the published output, for two
reasons:
1) The directory produced is for the consumption of devtool sdk-update,
and the installer isn't used by that at all
2) It wouldn't really make sense to point users at the update directory
to download the SDK installer because it contains a bunch of things
that aren't meant for manual download, so it wouldn't be very tidy.
Leaving the file present can mislead you into thinking the opposite of
both of the above.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
