Debugger: Log exceptions in build pane.

- Introduce constants for task categories, add "RunTime".
- Log exceptions under "RunTime".
- Clear pane on debugger start.
- Add 'first chance'

Task-number: QTCREATORBUG-8141
Change-Id: Icf68def06c42a0f3bb86dcc2ae74750b5397ca52
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/cdb/cdbparsehelpers.cpp

@@ -415,6 +415,8 @@ QString WinException::toString(bool includeLocation) const
     QTextStream str(&rc);
     formatWindowsException(exceptionCode, exceptionAddress,
                            exceptionFlags, info1, info2, str);
+    if (firstChance)
+        str << " (first chance)";
     if (includeLocation) {
         if (lineNumber) {
             str << " at " << QLatin1String(file) << ':' << lineNumber;