[PATCH] Object: Add support for bigobj

[Rui Ueyama]

LGTM with this nit.

================
Comment at: include/llvm/Object/COFF.h:248
@@ +247,3 @@
+        return CS16->SectionNumber;
+      return static_cast<int16_t>(CS16->SectionNumber);
+    }
----------------
majnemer wrote:
> ruiu wrote:
> > This needs a comment saying that the reserved section numbers are returned as negative numbers.
> Done.
Where did you add a comment?

http://reviews.llvm.org/D5259