64bit coreutils libgmp dependency

[Ronald Blaschke]

@ coreutils
...
requires: bash libattr1 libgmp3 libiconv2 libintl8 tzcode
...

I think this should be libgmp10, not libgmp3.  I noticed this because 
expr reported an error during a fresh install, and expr worked only 
after I installed libgmp10.

Ron