[patch, fortran] Remove vestiges of non-working Q exponent.

[Brooks Moses]

At one time, gfortran apparently supported a quad-precision exponent 
character, 1.0Q0, controlled by a -qkind= option.  It doesn't work, and 
doesn't look like it's worked in years; the option does nothing, and 
using 'Q' for an exponent causes an ICE.  The attached patch removes all 
of the related code.

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2006-11-08  Brooks Moses  <brooks.moses@codesourcery.com>

	* lang.opt: Remove non-working -qkind= option.
	* gfortran.h (gfc_option_t): Remove q_kind member.
	* options.c (gfc_init_options): Remove q_kind initialization.
	(gfc_handle_option): Remove -qkind= option handling.
	* primary.c: (match_real_constant): Remove 'Q' exponent.

----------------------------------------------------------------------

Regression-tested on i686-pc-linux-gnu.  Ok for trunk?  (Since it fixes 
an ICE, should I apply it to 4.2 as well?)

- Brooks
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