[KPhotoAlbum] Build instructions have been updated

[Robert Krawitz]

New warning in kph compile:


/home/rlk/sandbox/kphotoalbum/MainWindow/CopyPopup.cpp: In constructor ‘MainWindow::CopyPopup::CopyPopup(QWidget*, QUrl&, QList<QUrl>&, QString&, MainWindow::CopyPopup::CopyType)’:
/home/rlk/sandbox/kphotoalbum/MainWindow/CopyPopup.cpp:64:34: warning: ‘action’ may be used uninitialized in this function [-Wmaybe-uninitialized]
         action->setEnabled(false);
                                  ^
-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

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