Fix MSVC compat. MSVC doesn't have bzero.
Fix MSVC compat. MSVC doesn't have bzero.

Although the code is not valid to begin with. It is trying to do a raw memory
copy of a non standard-layout type. nameoffset is not guaranteed to directly
follow cmdsize.

This should be properly fixed.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@158612 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld