libs: add gl3_bind_texture_2d()

libs: add gl3_bind_texture_2d()

Since OpenGL3.1 removed the fixed pipelines[1] enabling 2D textures is not
needed. In particular, the Intel's Mesa implementation complains if it is
called.

This patch add a new binding function for 2D textures, without enabling
gl3_bind_texture_2d()[2].

1. https://www.opengl.org/wiki/Fixed_Function_Pipeline
2. https://www.opengl.org/wiki/Common_Mistakes#OOP_and_hidden_binding

Signed-off-by: Víctor Manuel Jáquez Leal <victorx.jaquez@intel.com>
https://bugzilla.gnome.org/show_bug.cgi?id=753099