[patch] Misc driver, middle-end and doc fixes for Fortran

[FX Coudert]

Attached patch does two things. First, it updates the list of Fortran  
file suffixes understood by the Fortran front-end (so that it matches  
the list in fortran/lang-specs.h), both in the driver and doc;  
Second, it fixes the last places where we still use "GNU F95" instead  
of "GNU Fortran" as the language name, which is in fortran/ 
f95_lang.c, dwarf2out.c and dbxout.c. The formal name of gfortran was  
transitioned from "GNU F95" or "GNU Fortran 95" to "GNU Fortran", now  
that we move to supporting standards newer than Fortran 95 (ie,  
Fortran 2003 and Fortran 2008).


Bootstrapped and regtested on x86_64-linux, OK to commit?

FX

-- 
François-Xavier Coudert
http://www.homepages.ucl.ac.uk/~uccafco/

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