Tentative fix for r351701 and gcc 6.2 build on ubuntu

llvm-svn: 351705

llvm/lib/MC/MCParser/AsmParser.cpp

@@ -158,9 +158,10 @@ private:
   /// The values from the last parsed cpp hash file line comment if any.
   struct CppHashInfoTy {
     StringRef Filename;
-    int64_t LineNumber = 0;
+    int64_t LineNumber;
     SMLoc Loc;
-    unsigned Buf = 0;
+    unsigned Buf;
+    CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {}
   };
   CppHashInfoTy CppHashInfo;