[LICENSE][POST-SCRIPTS][CONFIGURATOR] Update configurator & add license acceptace via configurator

Add the possibility to automatically accept the license for iMX and Raspberry Pi via configurator.

Solves issues on printing to terminal from post-scripts. Add printout of the version of seco-build-configurator.

Signed-off-by: Nicola Sparnacci nicola.sparnacci@seco.com