Without running clang-format on them. Also format one file at a time, so
we don't run into command line length limits as the number of formatted
files grows.

Change-Id: Ie559d566db784e04965678f056dcb81cefe95378
Reviewed-on: https://gerrit.libreoffice.org/48085Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>