automake (PR106)

Folks,

I have recently added support for building LLVM with automake. This
shouldn't affect anyone, and is entirely optional at this point. Note
that the automake support is currently in addition to the current
makefile system, it doesn't replace it. This effort isn't complete
(e.g. install doesn't work), but if you'd like to take a look at what's
coming or even help, it would be appreciated.

If you want to try automake support, you need to do the following:

1. Create a separate build directory (STRONGLY ADVISED)
2. Run autoconf/AutoRegen.sh with the --with-automake flag
3. Configure your new build directory as usual but use llvm/configure_am
    instead of llvm/configure
4. Run GNU make at top of your build directory

Note that the output is raw (commands shown). It will stay this way
through testing because its just easier to see what's going on.

You can find current status and additional information about the
automake support at:

http://llvm.cs.uiuc.edu/PR106

Reid