ProjectPart: Add callGroupId

Do not rely on the projectfile being unique anymore.

Change-Id: I52e63b3ac8aeca43ef70af1d59d1d8612bd3540e
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cpptools/cpprawprojectpart.cpp

@@ -66,6 +66,11 @@ void RawProjectPart::setConfigFileName(const QString &configFileName)
     this->projectConfigFile = configFileName;
 }
 
+void RawProjectPart::setCallGroupId(const QString &id)
+{
+    callGroupId = id;
+}
+
 void RawProjectPart::setQtVersion(ProjectPart::QtVersion qtVersion)
 {
     this->qtVersion = qtVersion;