Rename file to comply with Marble's coding style

tools/vectorosm-tilecreator/CMakeLists.txt

@@ -46,6 +46,6 @@ target_link_libraries(marble-vectorosm-process-land-polygons vectorosm-toolchain
 
 add_executable(marble-vectorosm-tirex-backend
     vectorosm-tirex-backend.cpp
-    tirexbackend.cpp
+    TirexBackend.cpp
 )
 target_link_libraries(marble-vectorosm-tirex-backend vectorosm-toolchain)

tools/vectorosm-tilecreator/tirexbackend.cpp → tools/vectorosm-tilecreator/TirexBackend.cpp

@@ -4,7 +4,7 @@
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
-#include "tirexbackend.h"
+#include "TirexBackend.h"
 
 #include <QDir>
 #include <QScopedValueRollback>

tools/vectorosm-tilecreator/vectorosm-tirex-backend.cpp

@@ -5,7 +5,7 @@
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
-#include "tirexbackend.h"
+#include "TirexBackend.h"
 
 #include "GeoDataDocumentWriter.h"
 #include "GeoDataPolygon.h"