CMakeProjectManager: Add the found packages to additional data

So we can find out which modules are used.

Change-Id: Ibde1c60c9c3e1686edd023ddbfb29ac307e13195
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -853,6 +853,15 @@ bool CMakeBuildSystem::hasSubprojectBuildSupport() const
     return cmakeGenerator().contains("Ninja") || cmakeGenerator().contains("Makefiles");
 }
 
+QVariant CMakeBuildSystem::additionalData(Id id) const
+{
+    if (id == "FoundPackages") {
+        // for analytics
+        return m_findPackagesFilesHash.keys();
+    }
+    return {};
+}
+
 RemovedFilesFromProject CMakeBuildSystem::removeFiles(Node *context,
                                                       const FilePaths &filePaths,
                                                       FilePaths *notRemoved)

src/plugins/cmakeprojectmanager/cmakebuildsystem.h

@@ -133,6 +133,7 @@ public:
     QString cmakeGenerator() const;
     bool hasSubprojectBuildSupport() const;
 
+    QVariant additionalData(Utils::Id id) const override;
 signals:
     void configurationCleared();
     void configurationChanged(const CMakeConfig &config);