Refactoring: move SDK Updater core code into sdklib.

This requires the 2 following changes:
in tools/base.git: I507a2bebe348fae598bc6e6fe24af3c5bf78acf0
in tools/ swt.git: I97c5874e6b5dcb5d6c0ca25ca921a291c6330fcc

Change-Id: I79742d366b176cee2443bbed1f96dc253e6c74bb
1 file changed