If getObjectType is passed an archive member whose name has been abbreviated in
the ar header, it 
might return the wrong type. This is because we're not passing in the decoded
name; we're passing in 
just the ar header.

The effect of this bug is to cause spurious warnings while linking archives
(e.g. libstdc++) with gccld. It 
could theoretically happen on any platform, I think, but I noticed it on the
Mac.

http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040329/013382.html

As above.