The last nail for std::unique_ptr (GCC variant, MSVC still doesn't work).

Use-case:
template<typename T>
static T f();

struct Foo { int bar; };

void fun()
{
    decltype(f<Foo>()) s;
    s.bar; // bar not highlighted
}

Task-number: QTCREATORBUG-14483
Task-number: QTCREATORBUG-8937
Change-Id: I5bab757400b070cf9dbb688a44fd8eafe95ddc61
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>