Add more logfile if kernel rpmbuild fails
When the kernel rpmbuild fails only seeing the last 25 lines of the build log is not always enough to see the error.
Now if the build fails it will show the last 500 lines of the build log.
When the kernel rpmbuild fails only seeing the last 25 lines of the build log is not always enough to see the error.
Now if the build fails it will show the last 500 lines of the build log.