Remove weak vtables. No functional change.

llvm-svn: 197323
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
index 6242a05..98623db 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
@@ -500,6 +500,7 @@
 public:
   DwarfCompileUnit(unsigned UID, DIE *D, DICompileUnit Node, AsmPrinter *A,
                    DwarfDebug *DW, DwarfFile *DWU);
+  virtual ~DwarfCompileUnit() LLVM_OVERRIDE;
 
   /// createGlobalVariableDIE - create global variable DIE.
   void createGlobalVariableDIE(DIGlobalVariable GV);
@@ -520,6 +521,7 @@
 public:
   DwarfTypeUnit(unsigned UID, DIE *D, uint16_t Language, AsmPrinter *A,
                 DwarfDebug *DW, DwarfFile *DWU);
+  virtual ~DwarfTypeUnit() LLVM_OVERRIDE;
 
   void setTypeSignature(uint64_t Signature) { TypeSignature = Signature; }
   void setType(const DIE *Ty) { this->Ty = Ty; }