gsdx ogl: load shader from C code instead of an external file
* add a perl script to convert shader to char*
* By default use *.glsl file (handy to do some trials). 

Only drawback, glsl2h need to be manually called at the moment



git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5632 96395faa-99c1-11dd-bbfe-3dabce05a288