Androdi: set m_isDeploying to false if deployment is cancelled

If Android deploy dialog is cancelled, then "Run" is clicked again,
the deploy dialog will not show again. Instead, a build is started then
fail in deploying because no device was actually selected. This makes
sure d->m_isDeploying = false in BuildManager.

Change-Id: I8cb899fa57df30b3669e42d30d0f280f8f73fb38
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/projectexplorer/buildmanager.cpp

@@ -791,6 +791,7 @@ bool BuildManager::buildLists(const QList<BuildStepList *> bsls, const QStringLi
     bool success = buildQueueAppend(steps, names, preambelMessage);
     if (!success) {
         d->m_outputWindow->popup(IOutputPane::NoModeSwitch);
+        d->m_isDeploying = false;
         return false;
     }