CppTools: Add target information to ProjectPart

This is important to be able to map sources to actual things that are
going to be built.

Change-Id: I1aef940767d60192642ed79a1703cff8dfdad9e1
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cmakeprojectmanager/tealeafreader.cpp

@@ -358,6 +358,7 @@ void TeaLeafReader::updateCodeModel(CppTools::RawProjectParts &rpps)
         includePaths += m_parameters.buildDirectory.toString();
         CppTools::RawProjectPart rpp;
         rpp.setProjectFileLocation(QString()); // No project file information available!
+        rpp.setBuildSystemTarget(cbt.title);
         rpp.setIncludePaths(includePaths);
 
         CppTools::RawProjectPartFlags cProjectFlags;