Add strtold and wcstold to libmingwex.a

Add strtold and wcstold to libmingwex.a

	* mingwex/strtold.c: New file.
	* mingwex/wcstold.c: New file.
	* mingwex/ldtoa.c: New file.
	* mingwex/math/cephes_emath.h: New file.
	* mingwex/math/cephes_emath.c: New file.
	* mingwex/Makefile.in (DISTFILES): Add new files.
	(MATH_DISTFILES): Ditto.
	(STDLIB_OBJS): New. Define as strtold.c wcstold.c.
	(MATH_OBJS): Add cephes_emath.o.
	(LIB_OBJS): Add $(STDLIB_OBJS).
	* include/stdlib.h (strtold, wcstold): Add prototypes.
	* include/wchar.h (wcstold): Add prototype.

Add missing ChangeLog entry for 2002-11-09.