Linux support

It would be great to have a native linux port. With this changes it is possible to compile under linux (I tried with archlinux).

For compiling I needed bison version 2.7 (version 3 and higher causes an error) and multilib-devel packages. I think that should be mentioned  in the [documentation](http://www.mosync.com/docs/sdk/tools/guides/extensions/building-mosync-source-linux/index.html)