darwin fat binary support bugfix

[LiKai Liu]

Hi all,

For darwin fat binary support in libtool, there is a line in ltmain.sh 
that should be changed.

Search for the comment that says "Okay now we have a bunch of thin 
objects, gota fatten them up :)". The line that follows has a part in the 
pipe that reads "xargs basename", which is incorrect as basename cannot 
process more than two arguments (the second argument being the suffix). It 
should read "$SED $basename" instead.

liulk