Wrong comment creation for GL_ARB_shading_language_include

When the include processor finds the line

#extension GL_ARB_shading_language_include : require

it's replaced with
/* GL_ARB_shading_language_include */ : require

instead of (for example)
/* #extension GL_ARB_shading_language_include : require */

causing the shader compiler to find an unexpected ":" and thus fail to compile the shader