Fix compilation issues with C++17

Testable on Linux/macOS by changing c++14 to c++1z in qtcreator.pri.
Testable with latest MSVC2017 by setting _CL_=/std:c++17.

unary_function, binary_function, and a few other things that were
deprecated are removed in C++17.
std::string got a non-const overload for its "data" member function,
so we cannot create a function pointer on it without specifying its
type. Use std::declval instead (though it requires a default constructor
for the type).

MSVC seems to have an issue with Utils::transform for std::vector
(used in Nim plugin), but that looks like a compiler issue.

Change-Id: I94f9a93d591d55b610f86fabfc618158927d6221
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/libs/glsl/glslengine.h

@@ -71,7 +71,7 @@ template <typename Type>
 class TypeTable
 {
 public:
-    struct Compare: std::binary_function<Type, Type, bool> {
+    struct Compare {
         bool operator()(const Type &value, const Type &other) const {
             return value.isLessThan(&other);
         }