Qt4: Fix configure_file call to use COPYONLY, not COPY_ONLY

Modules/Qt4Macros.cmake

@@ -232,7 +232,7 @@ macro (QT4_ADD_RESOURCES outfiles )
       # let's make a configured file and add it as a dependency so cmake is run
       # again when dependencies need to be recomputed.
       QT4_MAKE_OUTPUT_FILE("${infile}" "" "qrc.depends" out_depends)
-      configure_file("${infile}" "${out_depends}" COPY_ONLY)
+      configure_file("${infile}" "${out_depends}" COPYONLY)
     else()
       # The .qrc file does not exist (yet). Let's add a dependency and hope
       # that it will be generated later