spacing.m4: Use scalbn[f,l] if ldexp[f,l] is unavailable.

2006-10-13  Steven G. Kargl  <kargl@gcc.gnu.org>

        * m4/spacing.m4: Use scalbn[f,l] if ldexp[f,l] is unavailable.
        * m4/rrspacing.m4: Ditto.
        * generated/spacing_r4.c: Regenerated.
        * generated/spacing_r8.c: Ditto.
        * generated/spacing_r10.c: Ditto.
        * generated/spacing_r16.c: Ditto.
        * generated/rrspacing_r4.c: Ditto.
        * generated/rrspacing_r8.c: Ditto.
        * generated/rrspacing_r10.c: Ditto.
        * generated/rrspacing_r16.c: Ditto.

From-SVN: r117703