CppTools: Add target type information to project part

Let project managers store information whether a project part
belongs to an executable or a library and use this information
inside the AutoTest plugin.
This information will help to determine which targets are
relevant for the execution of tests.

Change-Id: I93b42797bf55225425398dc83aecea3c99eea290
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/qbsprojectmanager/qbsproject.cpp

@@ -1004,6 +1004,8 @@ void QbsProject::updateCppCodeModel()
             rpp.setProjectFileLocation(grp.location().filePath(),
                                        grp.location().line(), grp.location().column());
             rpp.setBuildSystemTarget(prd.name());
+            rpp.setBuildTargetType(prd.isRunnable() ? CppTools::ProjectPart::Executable
+                                                    : CppTools::ProjectPart::Library);
 
             QHash<QString, qbs::ArtifactData> filePathToSourceArtifact;
             bool hasCFiles = false;