[Ada] Housekeeping work in gigi (30/n)

[Eric Botcazou]

Tested on i586-suse-linux, applied on the mainline.


2010-10-09  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/misc.c: Delete prototypes.
	(gnat_init_options): Use local variable.
	(lang_hooks): Move to the end of the file.


-- 
Eric Botcazou
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