CMakePM: Add additional CMake parameters to the Kit's CMake config

This way one could pass --warn-uninitialized in the kit's configuration,
which will be transferred to the "Initial Configuration" and so on.

Fixes: QTCREATORBUG-26826
Task-number: QTCREATORBUG-26869
Change-Id: I6d9833a065ea790fc298a75b1120dfa360f885e8
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp

@@ -980,6 +980,7 @@ static QStringList defaultInitialCMakeArguments(const Kit *k, const QString buil
     }
 
     initialArgs += CMakeConfigurationKitAspect::toArgumentsList(k);
+    initialArgs += ProcessArgs::splitArgs(CMakeConfigurationKitAspect::additionalConfiguration(k));
 
     return initialArgs;
 }