eps: fix includes related to Qt Caterogized Logging

Testing Done:
Build on OS X 10.8

Reviewed at https://git.reviewboard.kde.org/r/125025/

src/imageformats/eps.cpp

@@ -8,10 +8,8 @@
 */
 #include "eps_p.h"
 
-#include <QDebug>
 #include <QImage>
 #include <QImageReader>
-#include <QLoggingCategory>
 #include <QPainter>
 #include <QPrinter>
 #include <QProcess>

src/imageformats/eps_p.h

@@ -8,6 +8,7 @@
 #define KIMG_EPS_H
 
 #include <QImageIOPlugin>
+#include <QLoggingCategory>
 
 class EPSHandler : public QImageIOHandler
 {
@@ -31,5 +32,7 @@ public:
     QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const Q_DECL_OVERRIDE;
 };
 
+Q_DECLARE_LOGGING_CATEGORY(EPSPLUGIN)
+
 #endif // KIMG_EPS_H