install pykde_config.sip too

BUG: 338137
REVIEW: 119679

CMakeLists.txt

@@ -251,6 +251,7 @@ python_install(__init__.py ${PYTHON_SITE_PACKAGES_INSTALL_DIR}/PyKDE4)
 
 # Install the .sip files for anyone that wants to build bindings on top of PyKDE4.
 # (Don't forget the / at the end of sip/.)
+install(FILES ${CMAKE_BINARY_DIR}/pykde_config.sip DESTINATION ${SIP_FILES_INSTALL_DIR}/PyKDE4/)
 install(DIRECTORY sip/ DESTINATION ${SIP_FILES_INSTALL_DIR}/PyKDE4
     PATTERN "*~" EXCLUDE    # This sucks, why can't I just whitelist what I _do_ want?
     PATTERN ".svn" EXCLUDE