QbsProjectManager: Add missing emit keywords

Found by clazy.

Change-Id: I55126cc2f6d19ea9f713f4c83cbf02e48d5ddf8e
Reviewed-by: Jake Petroules <jake.petroules@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/qbsprojectmanager/qbsbuildstep.cpp

@@ -391,15 +391,15 @@ void QbsBuildStep::handleProcessResultReport(const qbs::ProcessResult &result)
 
     QString commandline = result.executableFilePath() + ' '
             + Utils::QtcProcess::joinArgs(result.arguments());
-    addOutput(commandline, OutputFormat::Stdout);
+    emit addOutput(commandline, OutputFormat::Stdout);
 
     foreach (const QString &line, result.stdErr()) {
         m_parser->stdError(line);
-        addOutput(line, OutputFormat::Stderr);
+        emit addOutput(line, OutputFormat::Stderr);
     }
     foreach (const QString &line, result.stdOut()) {
         m_parser->stdOutput(line);
-        addOutput(line, OutputFormat::Stdout);
+        emit addOutput(line, OutputFormat::Stdout);
     }
     m_parser->flush();
 }