ProjectExplorer: Use Core::Id as RunMode "enum values"

This provides a way for third-party plugins to implement run
modes without the need to add a value to the central enum or
using manual workarounds like RunMode(*(int*)&someUniqueObject).

Instead of centrally defined enum values this uses Core::Id that could
be defined anywhere.

Change-Id: Ic350e3d8dbb8042c61b2d4ffec993ca151f53099
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/android/androidrunner.h

@@ -33,7 +33,7 @@
 
 #include "androidconfigurations.h"
 
-#include <projectexplorer/projectexplorerconstants.h>
+#include <projectexplorer/runconfiguration.h>
 
 #include <QObject>
 #include <QTimer>
@@ -58,7 +58,7 @@ class AndroidRunner : public QThread
 
 public:
     AndroidRunner(QObject *parent, AndroidRunConfiguration *runConfig,
-                  ProjectExplorer::RunMode runMode);
+                  Core::Id runMode);
     ~AndroidRunner();
 
     QString displayName() const;