Tested on software renderer and extreme2 accelerated renderer and found that glLineWidth() value is ignored, line width 
is always set to 1.0f. GL_LINE_SMOOTH is disabled. As far as I can understand I can't query OpenGL ES for supported line
 width, there are two possible queries, one for smoothed lines and one for aliased, and there is no for generic lines.

I know, that specification requires at least 1.0f support, but extreme2 hardware supports line width other than 1.0f.