created generic-ci script and refactored file permissions

Sven-Hendrik Haaserequested to merge
github/fork/shibumi/master into master

Created by: shibumi

set executables executable and created a generic-ci.sh script. With this script we are able to use travis or github actions or any other ci system.

Signed-off-by: Christian Rebischke chris@nullday.de

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