Add Q_OBJECT macro where it's missing

- Transifex tools complain about missing Q_OBJECT (which makes
  some sense -- you end up with a different context for calls
  to tr(), of the base class).

src/calamares/VariantModel.h

@@ -30,6 +30,7 @@
  */
 class VariantModel : public QAbstractItemModel
 {
+    Q_OBJECT
 public:
     /** @brief Auxiliary data
      *

src/libcalamares/JobExample.h

@@ -23,6 +23,7 @@ namespace Calamares
  */
 class DLLEXPORT NamedJob : public Job
 {
+    Q_OBJECT
 public:
     explicit NamedJob( const QString& name, QObject* parent = nullptr )
         : Job( parent )
@@ -39,6 +40,7 @@ protected:
 /// @brief Job does nothing, always succeeds
 class DLLEXPORT GoodJob : public NamedJob
 {
+    Q_OBJECT
 public:
     explicit GoodJob( const QString& name, QObject* parent = nullptr )
         : NamedJob( name, parent )
@@ -52,6 +54,7 @@ public:
 /// @brief Job does nothing, always fails
 class DLLEXPORT FailJob : public NamedJob
 {
+    Q_OBJECT
 public:
     explicit FailJob( const QString& name, QObject* parent = nullptr )
         : NamedJob( name, parent )

src/libcalamares/JobQueue.cpp

@@ -47,6 +47,7 @@ using WeightedJobList = QList< WeightedJob >;
 
 class JobThread : public QThread
 {
+    Q_OBJECT
 public:
     JobThread( JobQueue* queue )
         : QThread( queue )
@@ -288,3 +289,7 @@ JobQueue::globalStorage() const
 }
 
 }  // namespace Calamares
+
+#include "utils/moc-warnings.h"
+
+#include "JobQueue.moc"

src/modules/license/LicenseWidget.h

@@ -22,6 +22,7 @@ class QPushButton;
 
 class LicenseWidget : public QWidget
 {
+    Q_OBJECT
 public:
     LicenseWidget( LicenseEntry e, QWidget* parent = nullptr );
     ~LicenseWidget() override;