RT-Thread/rt-thread — pull request #326 by grissiom (2014-08-27 03:46:39+00:00)
Title: tools/keil: preserve the order of CPPPATH

The order of CPPPATH is important: some project would use the order of
CPPPATH to override the default configuration headers. This commit also
refine the this piece of code in a more Pythonic way.