Update rust-opengles.

This includes changes to move from ~[T] to Vec<T>.
Use str.to_owned() in tests.
~[] to Vec in FontStyle and FontGroup
~[] to Vec in style/media_quieres.rs, selectors.rs, stylesheets.rs
~[] to Vec in main/compositing and associated files
~[] to std::vec::Vec in layout
~[] to Vec in main/layout/construct.rs and associated files
~[] to Vec in main/layout/box_.rs, gfx/text/util.rs, main/layout/text.rs
~[] to Vec in main/layout/layout_task.rs, script/dom/clientrectlist.rs,
script/layout_interface.rs
~[] to Vec in main/layout/wrapper.rs
~[] to Vec in main/compositing/compositor_layer.rs
~[] to Vec in main/constellation.rs
~[] to Vec in main
~[] to Vec in layout flow, block, table, row, rowgroup, wrapper
~[] to Vec in table, table_colgroup, and text
~[] to Vec in glfw_windowing and servo
~[] to Vec in glut_windowing
~[] to Vec in gfx/font_list.rs
~[] to std::vec::Vec in gfx/text/glyph.rs
~[] to Vec in gfx/text/shaping/harfbuzz.rs