* d/control: libatlas-base-dev now directly depends on libblas-dev.
This is necessary for having cblas.h under /usr/include (as was
the case before libatlas-dev was dropped).
* Add archdef for sparc64.
* d/control: mark libatlas-doc as M-A foreign.
* d/orig-tar.{sh,exclude}: fetch TexDoc subdir from git instead of CVS.