[RFC]Make parse-tree-dumping functions available everywhere

[FX Coudert]

> Everytime I work on gfortran, I find myself patching the parse tree  
> dumping routines to not be static, so that I can use them from the  
> debugger, and add code dumps anywhere in the code paths I'm  
> interested in.
>
> Since I believe other people might find this useful as well, I  
> wanted to know if other people agree that we should turn time back  
> to the pre-fork days and make those routines globally visible  
> again, or if there are any objections and we should keep them static.

I had never thought of doing this, but it sure could be useful. Go  
for it!

FX