Data:dumper is critical for release script build.pl. Currently data:dumper
is installed by devtoolset as a dependency for autoconf. But, it seems,
that in earlier version of devtoolset the autoconf wasn't installed by
devtoolset which caused the failure with build.pl.
Change-Id: I487a17ca0eb37c5984eb2f195e1024ed019b80d2
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@qt.io>