debian/patches/: patchset re-worked against v2.71

- 0001-blender_thumbnailer.patch refreshed
- 0002-disable_tests.patch dropped (obsolete)
- #0003 => #0009 renumbered back by 1
- 0011-fix_FTBFS_on_unofficial_64bit_archs.patch renamed to #0009
- 0010-fix_FTBFS_on_non-linux_architectures.patch dropped (applied upstream)
- 0012-fix_FTBFS_due_to_SSE.patch dropped (applied upstream)

Closes: #752160, #752315