Update to upstream version '1.6.8'
with Debian dir d20765c5a9731d14dc7cb7a7f523a9fc6a8005db

Fix some issues reported by lintian

Fixes: lintian: upstream-metadata-file-is-missing
See-also: https://lintian.debian.org/tags/upstream-metadata-file-is-missing.html

Fixes: lintian: uses-debhelper-compat-file
See-also: https://lintian.debian.org/tags/uses-debhelper-compat-file.html

Fixes: lintian: package-uses-old-debhelper-compat-version
See-also: https://lintian.debian.org/tags/package-uses-old-debhelper-compat-version.html

Fixes: lintian: debian-source-options-has-custom-compression-settings
See-also: https://lintian.debian.org/tags/debian-source-options-has-custom-compression-settings.html

Closes: #888358
Thanks: James Cowgill <jcowgill@debian.org>

Update to upstream version '1.6.6'
with Debian dir d738cbf3f804dc7f6b0fd0828fcc0bb09f2f6ef9

This prevents build attempts on architectures without desktop gl support.

Upstream version 1.6.5

Remove explicit dh_autoreconf usage, now done by default