CMakeProjectManager: Include cmake file path for package information

Amends 9310c8c148bd927ea12e9fde42fab16fb8a31c5f

Include the information where a package was found, so we can filter out
packages that are not found in Qt itself.

Change-Id: I665ce2623b8fa395caa79ac29ce627a1892fd4b0
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -857,7 +857,7 @@ QVariant CMakeBuildSystem::additionalData(Id id) const
 {
     if (id == "FoundPackages") {
         // for analytics
-        return m_findPackagesFilesHash.keys();
+        return QVariant::fromValue(m_findPackagesFilesHash);
     }
     return {};
 }