debian/patches/: patchset updated against v2.71+dfsg1

- 0001-blender_thumbnailer.patch updated
- 0002-install_in_usr_share.patch refreshed
- 0003-filter_docs_to_install.patch refreshed
- 0004-locales_directory_install.patch refreshed
- 0005-update_manpages.patch updated
- 0006-do_not_use_version_number_in_system_path.patch refreshed
- 0007-look_for_droid_ttf_with_fontconfig.patch refreshed