Some feedback about 2-3 second delay before running qmake

The GdbMacrosBuildStep is taking quite long and didn't tell the user
what it was doing. This message helps a bit, but we should fix the
delay.

Reviewed-by: dt

src/plugins/qt4projectmanager/gdbmacrosbuildstep.cpp

@@ -65,13 +65,13 @@ void GdbMacrosBuildStep::run(QFutureInterface<bool> & fi)
 {
     QVariant v = value("clean");
     if (v.isNull() || v.toBool() == false) {
+        addToOutputWindow("<b>Creating gdb macros library...</b>");
         // Normal run
         QString dumperPath = Core::ICore::instance()->resourcePath() + "/gdbmacros/";
         QStringList files;
         files << "gdbmacros.cpp"
               << "gdbmacros.pro";
 
-
         QString destDir = m_buildDirectory + "/qtc-gdbmacros/";
         QDir dir;
         dir.mkpath(destDir);
@@ -124,7 +124,6 @@ void GdbMacrosBuildStep::run(QFutureInterface<bool> & fi)
         qmake.start(m_qmake, QStringList()<<"-spec"<<mkspec<<configarguments<<"gdbmacros.pro");
         qmake.waitForFinished();
 
-
         qmake.start(qt4Project->qtVersion(m_buildConfiguration)->makeCommand(), makeArguments);
         qmake.waitForFinished();