Support in hasDeclaration for types with getDecl()
    
Using a new metafunction for detecting the presence of the member
'getDecl' in a type T, added support to hasDeclaration for any such type
T. This allows hasDecl() to be replaced and enables several other
subclasses of clang::Type to use hasDeclaration.

Updated unittests and LibASTMatchersReference.html.

Reviewers: klimek


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175532 91177308-0d34-0410-b5e6-96231b3b80d8
Correctly format macro with unfinished template declaration.

We can now format:
  #define A template <typename T>

Before this created a segfault :-/.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175533 91177308-0d34-0410-b5e6-96231b3b80d8