glsl: Update the #line behaviour on GLSL 3.30+ and GLSL ES+

glsl: Update the #line behaviour on GLSL 3.30+ and GLSL ES+

From GLSL 3.30 and GLSL ES 1.00 on, after processing the line
directive (including its new-line), the implementation should
behave as if it is compiling at the line number passed as
argument. In previous versions, it behaved as if compiling
at the passed line number + 1.

Partially fixes https://bugs.freedesktop.org/show_bug.cgi?id=88815

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>