Add clog10 to builtins.def, round 2

[FX Coudert]

> OK to commit?

Ping.

This problem is really blocking a very nice gfortran feature (support 
for large real kinds). Since it is very short, could someone review it?

FX
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: allkinds2_middle-end.ChangeLog
URL: <https://gcc.gnu.org/pipermail/gcc/attachments/20050719/64e3bb61/attachment.ksh>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: allkinds2_middle-end.diff
URL: <https://gcc.gnu.org/pipermail/gcc/attachments/20050719/64e3bb61/attachment-0001.ksh>