Ensure 3rd party libraries are writable.

This patch fixes CMake.Install when Qt4 is installed read-only by packaging
system like Homebrew.

Source/QtDialog/CMakeLists.txt

@@ -112,6 +112,7 @@ ELSE(NOT QT4_FOUND)
     endif(APPLE)
     install(CODE "
       include(\"${CMake_SOURCE_DIR}/Modules/BundleUtilities.cmake\")
+      set(BU_CHMOD_BUNDLE_ITEMS ON)
       fixup_bundle(\"${fixup_exe}\" \"\" \"${QT_LIBRARY_DIR};${QT_BINARY_DIR}\")
     ")
   endif(APPLE OR WIN32)