move finetuning out of report generation and provide summarized information.

This pull-request addresses two issues:

    finetuning shouldn't be executed as part of the report genereation. Finetuning is not related to the report and should be performed even if reportgeneration is sommented out.

    it is useful to have an summary of the buildprocess after runing make. the currently provided informations don't include errors during finetuning. One has to check the execution of each command in elbe-report.txt. As this is not very practical this patchset adds a build summary that is displayed after a build.