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
layout: Implement `caption-side` per CSS 2.1 § 17.4.1.

`caption-side` is used by 4% of pages by number of loads.