AutoTest: Fix handling exceptions while environment setup

If setting up the environment for gtest fails due to an exception
we might end up having no reportable result but we get a return
code of 1 for the test application.
Inform the results pane instead of just ignoring the return code
and explicitly send a fatal result for this.

Task-number: QTCREATORBUG-20280
Change-Id: I05e522764d6302c5b0760c4bc10e01a2248a4494
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/autotest/testoutputreader.h

@@ -45,6 +45,7 @@ public:
     virtual void processOutput(const QByteArray &outputLine) = 0;
     virtual void processStdError(const QByteArray &output);
     void reportCrash();
+    void createAndReportResult(const QString &message, Result::Type type);
     bool hadValidOutput() const { return m_hadValidOutput; }
 
 signals: