Fix .eh table linkage issues on Darwin.  Some EH support
for Darwin PPC, but it's not fully working yet.

llvm-svn: 44258
diff --git a/llvm/lib/Target/X86/X86AsmPrinter.cpp b/llvm/lib/Target/X86/X86AsmPrinter.cpp
index 078709b..31e5010 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -214,7 +214,7 @@
     case GlobalValue::WeakLinkage:
       if (Subtarget->isTargetDarwin()) {
         O << "\t.globl\t" << name << "\n"
-          << "\t.weak_definition " << name << "\n";
+          << TAI->getWeakDefDirective() << name << "\n";
         SwitchToDataSection(".section __DATA,__const_coal,coalesced", I);
       } else if (Subtarget->isTargetCygMing()) {
         std::string SectionName(".section\t.data$linkonce." +