[v3] FP printing, take 3

[Benjamin Kosnik]

Patch is mal formed, again. Please cvs add src/floatconv.cc, and then cvs diff
-c -p -N src/floatconv.cc to get the diff for this new file.

-benjamin

>2004-08-29  Jerry Quinn  jlquinn@optonline.net
>
>	* config/linker-map.gnu (GLIBCXX_3.4.3): Add dec_exponent,
>        float_to_char_sprintf, dtoa.
>	* include/bits/locale_facets.tcc (__float_to_char_fixed,
>	__float_to_char_scientific, __float_to_char): New.
>	(__dec_exponent, __dtoa, __float_to_char_sprintf): Declare.
>	(num_put::_M_insert_float): Use __float_to_char instead of
>        __convert_from_v.
>	* Makefile.am (sources):  Add floatconv.cc.
>	* Makefile.in: Regenerate.
>	* src/floatconv.cc.