Fix PyQt compat lib INSTALL path

Author: m-kuhn

python/PyQt/CMakeLists.txt

@@ -22,6 +22,7 @@ ENDIF(ENABLE_QT5)
 
 FOREACH(pyfile ${PYQT_COMPAT_FILES})
   SET(pyfile ${PYQT_PREFIX}/${pyfile})
+  LIST(APPEND PYQT_COMPAT_FILES_PREFIXED ${pyfile})
   ADD_CUSTOM_COMMAND(TARGET pyqtcompat
     POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E make_directory ${PYTHON_OUTPUT_DIRECTORY}/PyQt
@@ -32,4 +33,4 @@ FOREACH(pyfile ${PYQT_COMPAT_FILES})
 ENDFOREACH(pyfile)
 PY_COMPILE(pyqtcompat "${PYTHON_OUTPUT_DIRECTORY}/PyQt")
 
-INSTALL(FILES ${PYQT_COMPAT_FILES} DESTINATION "${QGIS_PYQT_DIR}")
+INSTALL(FILES ${PYQT_COMPAT_FILES_PREFIXED} DESTINATION "${QGIS_PYQT_DIR}")