hookize the cygwin ".linkonce" directive.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93855 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCAsmInfo.cpp b/lib/MC/MCAsmInfo.cpp
index 4c53d7a..556b0aa 100644
--- a/lib/MC/MCAsmInfo.cpp
+++ b/lib/MC/MCAsmInfo.cpp
@@ -62,6 +62,7 @@
   UsedDirective = 0;
   WeakRefDirective = 0;
   WeakDefDirective = 0;
+  LinkOnceDirective = 0;
   // FIXME: These are ELFish - move to ELFMAI.
   HiddenDirective = "\t.hidden\t";
   ProtectedDirective = "\t.protected\t";