Changes file: Add contributors, clarify Clang code model entry

Change-Id: I6939afa8cd036b9201b56bb687ea92a82a618d08
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>

dist/changes-3.6.0.md

@@ -51,7 +51,7 @@ C++ Support
 
 * Added support for `noexcept`
 * Clang code model
-    * Added diagnostic messages to editors
+    * Added more diagnostic messages to editors
     * Added Clang's Fix-its to refactoring actions (QTCREATORBUG-14868)
 
 Debugging
@@ -125,3 +125,46 @@ Remote Linux
   ECDSA user keys, and ECDSA key creation
 * Fixed environment and working directory for Valgrind analyzer
 
+Credits for these changes go to:
+Aleix Pol
+Alessandro Portale
+Alexander Drozdov
+Andre Hartmann
+André Pönitz
+Benjamin Zeller
+BogDan Vatra
+Christian Kandeler
+Christian Stenger
+Christian Strømme
+Claus Steuer
+Cristian Adam
+Daniel Teske
+David Schulz
+Eike Ziller
+Jake Petroules
+Jakub Golebiewski
+Jan Dalheimer
+Jarek Kobus
+Jean Gressmann
+Jochen Becher
+Leena Miettinen
+Lorenz Haas
+Marco Bubke
+Maurice Kalinowski
+Mitch Curtis
+Montel Laurent
+Niels Weber
+Nikita Baryshnikov
+Nikolai Kosjar
+Oliver Wolff
+Orgad Shaneh
+Oswald Buddenhagen
+Robert Loehning
+Sze Howe Koh
+Thiago Macieira
+Thomas Hartmann
+Thorbjørn Lindeijer
+Tim Jenssen
+Tobias Hunger
+Ulf Hermann
+Vladyslav Gapchych