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/MCAsmInfoCOFF.cpp b/lib/MC/MCAsmInfoCOFF.cpp
index 23b0dd7..1b27bf0 100644
--- a/lib/MC/MCAsmInfoCOFF.cpp
+++ b/lib/MC/MCAsmInfoCOFF.cpp
@@ -25,6 +25,7 @@
   HiddenDirective = NULL;
   PrivateGlobalPrefix = "L";  // Prefix for private global symbols
   WeakRefDirective = "\t.weak\t";
+  LinkOnceDirective = "\t.linkonce same_size\n";
   SetDirective = "\t.set\t";
 
   // Set up DWARF directives