[partition] Reduce Transifex warnings

- Add a (superfluous, since they don't have their own signals or slots)
   Q_OBJECT macro to the VG jobs, to silence a Transifex warning (this
   does make sure that the tool knows about the context for the translated
   messages)

src/modules/partition/jobs/CreateVolumeGroupJob.h

@@ -27,6 +27,7 @@
 
 class CreateVolumeGroupJob : public Calamares::Job
 {
+    Q_OBJECT
 public:
     CreateVolumeGroupJob( QString& vgName, QVector< const Partition* > pvList, const qint32 peSize );
 

src/modules/partition/jobs/DeactivateVolumeGroupJob.h

@@ -25,6 +25,7 @@ class LvmDevice;
 
 class DeactivateVolumeGroupJob : public Calamares::Job
 {
+    Q_OBJECT
 public:
     DeactivateVolumeGroupJob( LvmDevice* device );
 

src/modules/partition/jobs/RemoveVolumeGroupJob.h

@@ -25,6 +25,7 @@ class LvmDevice;
 
 class RemoveVolumeGroupJob : public Calamares::Job
 {
+    Q_OBJECT
 public:
     RemoveVolumeGroupJob( LvmDevice* device );
 

src/modules/partition/jobs/ResizeVolumeGroupJob.h

@@ -28,6 +28,7 @@ class Partition;
 
 class ResizeVolumeGroupJob : public Calamares::Job
 {
+    Q_OBJECT
 public:
     ResizeVolumeGroupJob( LvmDevice* device, QVector< const Partition* >& partitionList );