Qbs: Fix copying of QbsBuildSteps

This should fix quite a few issues with e.g. changing and cloning kits.

Change-Id: Ia3278ff1a5eb1ab4c019dca5806ce7fc691e4d8e
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/qbsprojectmanager/qbsbuildstep.cpp

@@ -72,7 +72,9 @@ QbsBuildStep::QbsBuildStep(ProjectExplorer::BuildStepList *bsl) :
 QbsBuildStep::QbsBuildStep(ProjectExplorer::BuildStepList *bsl, const QbsBuildStep *other) :
     ProjectExplorer::BuildStep(bsl, Core::Id(Constants::QBS_BUILDSTEP_ID)),
     m_qbsBuildOptions(other->m_qbsBuildOptions),  m_job(0), m_parser(0)
-{ }
+{
+    setQbsConfiguration(other->qbsConfiguration());
+}
 
 QbsBuildStep::~QbsBuildStep()
 {

src/plugins/qbsprojectmanager/qbsbuildstep.h

@@ -95,6 +95,8 @@ private:
 
     QVariantMap m_qbsConfiguration;
     qbs::BuildOptions m_qbsBuildOptions;
+
+    // Temporary data:
     QStringList m_changedFiles;
     QStringList m_products;