RemoteLinux: Retrieve deployment info from local install root

This provides correct deployment information as seen by the build system
when Qt Creator cannot retrieve it directly.
It's most useful for autotools and cmake projects, but can also help
with qmake in certain edge cases.

[ChangeLog] It is no longer necessary to provide a
QtCreatorDeployment.txt file when using CMake projects with remote Linux
devices.

Fixes: QTCREATORBUG-21855
Change-Id: I27e07a45dd1565e489f4b573cc3fff8191c57d9b
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/qmlprojectmanager/qmlproject.cpp

@@ -347,6 +347,11 @@ Project::RestoreResult QmlProject::fromMap(const QVariantMap &map, QString *erro
     return RestoreResult::Ok;
 }
 
+ProjectExplorer::DeploymentKnowledge QmlProject::deploymentKnowledge() const
+{
+    return DeploymentKnowledge::Perfect;
+}
+
 void QmlProject::generateProjectTree()
 {
     if (!m_projectItem)