Remove needless bitwise-AND.
Remove needless bitwise-AND.

Because applyMask ignores upper bits, we don't need to mask them.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@334647 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld