Update glfw-rs.
Update glfw-rs.

Reference: https://github.com/bjz/glfw-rs/pull/203.

Signed-off-by: OGINO Masanori <c49462fef669560e618607913e6c283f7627123c@gmail.com>

jimarnold/gl-rs,skligys/gl-rs,jimarnold/gl-rs,tomaka/gl-rs,bjz/gl-rs,bjz/gl-rs,neon64/gl-rs,neon64/gl-rs,skligys/gl-rs,tomaka/gl-rs,nicokoch/gl-rs,nicokoch/gl-rs