[Patch] *-*-solaris2.[56789] (cross) don't actually have strtold or strtof (3.4 and trunk)

[Benjamin Kosnik]

> Attached is a patch against the 3.4.3 crossconfig.m4, presuming that
> the triplet for Solaris 10 is *-*-Solaris2.10 :)
> 
> The same change needs to be applied to the 3.4 branch and mainline. 

Brad, this stuff looks good. I'll apply it to head and gcc-3_4-branch.

best,
benjamin