Top level: Separate src release scripts from Makefile (correct)

[Andrew Cagney]

> This time it actually works;
> 'make -f src-release gdb+dejagnu.tar' works (and the md5sum is there).
> 'make -f src-release gas.tar.bz' works.
> 
> otherwise the same as 
> http://gcc.gnu.org/ml/gcc-patches/2002-09/msg01761.html, 
> including ChangeLog.
> 

Today's GDB's snap appears to have worked.  We've now got a stable baseline.

I've updated GDB's snapshot script so that it will work with either 
src-release (prefered) or Makefile.in.

 From GDB's point of view, I think the next steps are: commit the 
src-release file; check that tomorrow's snap works; and finally, commit 
the src/Makefile changes so all is back in sync.

Although, before all this you need a thumbs up from binutils.

Andrew