[PATCH] [mc-coff] Resolve aliases when emitting COFF relocations

[Saleem Abdulrasool]

================
Comment at: test/MC/COFF/alias.s:22
@@ +21,3 @@
+
+// FIXME: To reviewer, please provide guidance on how to improve this test.
+
----------------
Id say drop this before committing.

================
Comment at: test/MC/COFF/alias.s:20
@@ +19,3 @@
+        .long _bar3
+        .long _bar4
+
----------------
It would be nice if you would rename these to be a bit more helpful.

e.g.:

        .globl _external_aliased_to_local
    _local:
    _external_aliased_to_local = _local


http://llvm-reviews.chandlerc.com/D1079