[NFC][clang] Fix Coverity bugs with AUTO_CAUSES_COPY

Reported by Coverity:
AUTO_CAUSES_COPY
Unnecessary object copies can affect performance.

1. Inside "ExtractAPIVisitor.h" file, in clang::extractapi::impl::ExtractAPIVisitorBase<<unnamed>::BatchExtractAPIVisitor>::VisitFunctionDecl(clang::FunctionDecl const *): Using the auto keyword without an & causes the copy of an object of type DynTypedNode.

2. Inside "NeonEmitter.cpp" file, in <unnamed>::Intrinsic::Intrinsic(llvm::Record *, llvm::StringRef, llvm::StringRef, <unnamed>::TypeSpec, <unnamed>::TypeSpec, <unnamed>::ClassKind, llvm::ListInit *, <unnamed>::NeonEmitter &, llvm::StringRef, llvm::StringRef, bool, bool): Using the auto keyword without an & causes the copy of an object of type Type.

3. Inside "MicrosoftCXXABI.cpp" file, in <unnamed>::MSRTTIBuilder::getClassHierarchyDescriptor(): Using the auto keyword without an & causes the copy of an object of type MSRTTIClass.

4. Inside "CGGPUBuiltin.cpp" file, in clang::CodeGen::CodeGenFunction::EmitAMDGPUDevicePrintfCallExpr(clang::CallExpr const *): Using the auto keyword without an & causes the copy of an object of type CallArg.

5. Inside "SemaDeclAttr.cpp" file, in threadSafetyCheckIsSmartPointer(clang::Sema &, clang::RecordType const *): Using the auto keyword without an & causes the copy of an object of type CXXBaseSpecifier.

6. Inside "ComputeDependence.cpp" file, in clang::computeDependence(clang::DesignatedInitExpr *): Using the auto keyword without an & causes the copy of an object of type Designator.

7. Inside "Format.cpp" file, In clang::format::affectsRange(llvm::ArrayRef<clang::tooling::Range>, unsigned int, unsigned int): Using the auto keyword without an & causes the copy of an object of type Range.

Reviewed By: tahonermann

Differential Revision: https://reviews.llvm.org/D149074