obiot/melonJS — pull request #184 by DblK (2013-03-29 04:56:41+00:00)
Title: Update Makefile to work on Windows

It's a known problem when we use GNU make command line utility on Windows that it won't work because of the shell command unknown.
My modification do the trick and so now we can compile on Windows.
I made a condition to avoid modification on other system than Windows.