build: updated to new clang and other fixes

* don't save macros from external files
* fixed macro and include saving duplicates
* added NODE_UNDEFINED_MACRO

TIL = You need to cut a 1kg cake about 85 times in half until you have a piece with only a single atom.

src/lib/data/graph/Edge.cpp

@@ -364,7 +364,7 @@ bool Edge::checkType() const
 		}
 		return true;
 	case EDGE_MACRO_USAGE:
-		if(!m_to->isType(Node::NODE_MACRO) || !m_from->isType(Node::NODE_FILE))
+		if(!m_to->isType(Node::NODE_MACRO | Node::NODE_UNDEFINED_MACRO) || !m_from->isType(Node::NODE_FILE))
 		{
 			break;
 		}