BuildManager: Provide context of earlier build steps to init

This information can be used to get information from earlier steps,
which e.g. queried for android devices to deploy to.

Change-Id: Iefe1c9443915cb6211f86f98ff7aaf3cb75145ba
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>

src/plugins/android/androiddeployqtstep.cpp

@@ -166,8 +166,9 @@ void AndroidDeployQtStep::ctor()
             this, &AndroidDeployQtStep::slotSetSerialNumber);
 }
 
-bool AndroidDeployQtStep::init()
+bool AndroidDeployQtStep::init(QList<const BuildStep *> &earlierSteps)
 {
+    Q_UNUSED(earlierSteps);
     m_androiddeployqtArgs.clear();
 
     if (AndroidManager::checkForQt51Files(project()->projectDirectory()))