gdb/gnulib: Import frexpl.

gdb/ChangeLog:

2013-06-21  Will Newton  <will.newton@linaro.org>

	* gnulib/update-gnulib.sh(IMPORTED_GNULIB_MODULES): Add frexpl.
	* gnulib/aclocal.m4: Regenerate.
	* gnulib/config.in: Regenerate.
	* gnulib/configure: Regenerate.
	* gnulib/import/Makefile.am: Update.
	* gnulib/import/Makefile.in: Update.
	* gnulib/import/m4/gnulib-cache.m4: Update.
	* gnulib/import/m4/gnulib-comp.m4: Update.
	* gnulib/import/float+.h: Import.
	* gnulib/import/float.c: Import.
	* gnulib/import/float.in.h: Import.
	* gnulib/import/fpucw.h: Import.
	* gnulib/import/frexp.c: Import.
	* gnulib/import/frexpl.c: Import.
	* gnulib/import/isnan.c: Import.
	* gnulib/import/isnand-nolibm.h: Import.
	* gnulib/import/isnand.c: Import.
	* gnulib/import/isnanl-nolibm.h: Import.
	* gnulib/import/isnanl.c: Import.
	* gnulib/import/itold.c: Import.
	* gnulib/import/m4/exponentd.m4: Import.
	* gnulib/import/m4/exponentl.m4: Import.
	* gnulib/import/m4/float_h.m4: Import.
	* gnulib/import/m4/fpieee.m4: Import.
	* gnulib/import/m4/frexp.m4: Import.
	* gnulib/import/m4/frexpl.m4: Import.
	* gnulib/import/m4/isnand.m4: Import.
	* gnulib/import/m4/isnanl.m4: Import.
	* gnulib/import/m4/math_h.m4: Import.
	* gnulib/import/math.c: Import.
	* gnulib/import/math.in.h: Import.
gdb/doublest.c: Use frexpl rather than ldfrexp.

Most modern systems have frexpl and gnulib provides an implementation
for those that don't, so use it instead of the generic but inaccurate
ldfrexp.

gdb/ChangeLog:

2013-06-21  Will Newton  <will.newton@linaro.org>

	* doublest.c (ldfrexp): Remove function.
	(convert_doublest_to_floatformat): Call frexpl instead of
	ldfrexp.