swupdate: Disable partition algorith when LTO is enabled
swupdate: Disable partition algorith when LTO is enabled

-flto-partition=none is needed when building with -flto
Use += to add libconfig to depends, so it does not overwrite the
programmatically added dependencies

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

sbabic/meta-swupdate,sbabic/meta-swupdate