Fix uninitialized class members

llvm/include/llvm/ObjectYAML/DXContainerYAML.h

 
 struct PSVInfo {
   // The version field isn't actually encoded in the file, but it is inferred by
   // the size of data regions. We include it in the yaml because it simplifies
   // the format.
   uint32_t Version;
 
   dxbc::PSV::v2::RuntimeInfo Info;
-  uint32_t ResourceStride;
+  uint32_t ResourceStride{0};
   SmallVector<ResourceBindInfo> Resources;
   SmallVector<SignatureElement> SigInputElements;
   SmallVector<SignatureElement> SigOutputElements;
   SmallVector<SignatureElement> SigPatchOrPrimElements;
 
   void mapInfoForVersion(yaml::IO &IO);
 
   PSVInfo();

llvm/lib/MC/XCOFFObjectWriter.cpp

 struct CInfoSymInfo {
   // Name of the C_INFO symbol associated with the section
   std::string Name;
   std::string Metadata;
   // Offset into the start of the metadata in the section
   uint64_t Offset;
 
   CInfoSymInfo(std::string Name, std::string Metadata)
-      : Name(Name), Metadata(Metadata) {}
+      : Name(Name), Metadata(Metadata), Offset(0) {}
   // Metadata needs to be padded out to an even word size.
   uint32_t paddingSize() const {
     return alignTo(Metadata.size(), sizeof(uint32_t)) - Metadata.size();
   };
 
   // Total size of the entry, including the 4 byte length
   uint32_t size() const {
     return Metadata.size() + paddingSize() + sizeof(uint32_t);