Return early. NFC.
Return early. NFC.

We don't need to handle an object file having more than one symbol table,
so as soon as we find the first one, we can process it and then return
from the function.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@326977 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld