ProjectExplorer: Always initialize RunControl's runnable from RunConfig

That's a good first approximation and often enough all that is needed.

Change-Id: If54cdb0e98cda94bc4a4ef24fcc12c78018c4dbe
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/runconfiguration.cpp

@@ -603,6 +603,7 @@ using namespace Internal;
 RunControl::RunControl(RunConfiguration *runConfiguration, Core::Id mode) :
     d(new RunControlPrivate(this, runConfiguration, mode))
 {
+    d->runnable = runConfiguration->runnable();
 #ifdef WITH_JOURNALD
     JournaldWatcher::instance()->subscribe(this, [this](const JournaldWatcher::LogEntry &entry) {
         if (entry.value("_MACHINE_ID") != JournaldWatcher::instance()->machineId())