[binutils-gdb] gdb/fortran: Add new function to evaluate Fortran expressions

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT 9dad4a58a1bddeb1cc2ec8b3782d7463b03b7b4b ***

Author: Andrew Burgess <andrew.burgess@embecosm.com>
Branch: master
Commit: 9dad4a58a1bddeb1cc2ec8b3782d7463b03b7b4b

gdb/fortran: Add new function to evaluate Fortran expressions

This is an initial restructure, it adds a new function in which
Fortran specific expressions can be evaluated.  No Fortran specific
expressions are added with this commit though, so for now, the new
function just forwards all expressions to the default expression
handler, as such, there should be no user visible changes after this
commit.  However, the new function will be useful in later commits.

gdb/ChangeLog:

	* f-lang.c (evaluate_subexp_f): New function.
	(exp_descriptor_f): New global.
	(f_language_defn): Use exp_descriptor_f instead of
	exp_descriptor_standard.