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.

(From OE-Core rev: a9ec72b7897ffc0b901c1ccbcbe3cabbc7ac41ee)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/oe-publish-sdk

@@ -53,6 +53,7 @@ def publish(args):
     else:
         is_remote = False
         dest_sdk = os.path.join(destination, sdk_basename)
+        destdir = destination
 
     # Making sure the directory exists
     logger.debug("Making sure the destination directory exists")
@@ -83,16 +84,19 @@ def publish(args):
 
     # Unpack the SDK
     logger.info("Unpacking SDK")
+    cleanupfiles = [dest_sdk, os.path.join(destdir, 'ext-sdk-prepare.py')]
     if not is_remote:
         cmd = "sh %s -n -y -d %s" % (dest_sdk, destination)
         ret = subprocess.call(cmd, shell=True)
         if ret == 0:
             logger.info('Successfully unpacked %s to %s' % (dest_sdk, destination))
+            for cleanupfile in cleanupfiles:
+                os.remove(cleanupfile)
         else:
             logger.error('Failed to unpack %s to %s' % (dest_sdk, destination))
             return ret
     else:
-        cmd = "ssh %s 'sh %s -n -y -d %s'" % (host, dest_sdk, destdir)
+        cmd = "ssh %s 'sh %s -n -y -d %s && rm -f %s'" % (host, dest_sdk, destdir, ' '.join(cleanupfiles))
         ret = subprocess.call(cmd, shell=True)
         if ret == 0:
             logger.info('Successfully unpacked %s to %s' % (dest_sdk, destdir))