I've attached a patch that allows ROOT to build and run on FreeBSD 9.0/amd64.
It does several small things: 
- Fix the build system to recognize FreeBSD > 7 by treating it with the
  build architecture freebsd7. 
- Use UTMPX instead of UTMP for FreeBSD >= 9 
- Add a cint iosenum file (not sure why it wanted it to be called 
  iosenum.freebsd73) 
- Correct a few places that use <malloc.h>, which is deprecated on FreeBSD
  (like on OS X), and has a #error in it. 

This also fixes one other, mostly unrelated issue: 
- Follow rename of FramebufferTexturLayer to FramebufferTextureLayer in
  MESA 2 years ago. This is not a FreeBSD-specific issue, and should be
  a platform independent change.


git-svn-id: http://root.cern.ch/svn/root/trunk@39990 27541ba8-7e3a-0410-8455-c3a389f83636