* Sync with Debian:
  Remaining Ubuntu Changes
  + debian/rules:
    - use --with-tls=__thread on all archs
  + debian/control:
    - add sparc to the supported archs
    - adjust Replaces for the Ubuntu versions
  + debian/patches/mono_lexical_blocks.dpatch,
    debian/patches/mono_sparclinux_atomics.dpatch,
    debian/patches/mono_sparclinux_libgc_etext.dpatch:
    - sparc patches added again