Inset and outset border coloring is incorrect on left side border.

This patch will fix this issue.
Thanks to differences on rendering between CPU X GPU, there is a 1 pixel wide
difference in the position where the top border meets the right border (as
also the right border X bottom border).

The workaround to have a test that will work on both modes is to cover the
affected area with a white div. This patch adds inset test.
Adding tests for outset.
Cropping the ref images to save some bytes (as also adjust test borders
to match results).
Update gleam, clear initial framebuffer under glutin.
auto merge of #4393 : Adenilson/servo/fixInsetOutsetColor01, r=pcwalton
Include gleam for android
auto merge of #4398 : glennw/servo/glutin-clear, r=pcwalton
Update rustc to revision 3dcd2157403163789aaf21a9ab3c4d30a7c6494d.
Various compile fixes for android rustup (link still fails).
auto merge of #4405 : servo/servo/rustup_20141124, r=jdm
Compile fix for glutin feature after rust upgrade.
auto merge of #4414 : glennw/servo/fix-glutin, r=larsbergstrom
wip