Remove old hubbub HTML parsing code
auto merge of #3705 : mbrubeck/servo/rm-hubbub, r=kmcallister

Unused after #3702. r? @kmcallister
Update SHA1 for rust-mozjs. Also update the android Cargo.lock file for recent changes.
Make HTMLFormElementHelpers::submit take an enumerated argument instead of a boolean

Fixes #3677
auto merge of #3710 : gilles-leblanc/servo/issue-3677, r=jdm

...of a boolean

Fixes #3677
auto merge of #3709 : glennw/servo/update-mozjs, r=jdm
Update wptrunner to pick up crash-detection fixes.
auto merge of #3700 : Ms2ger/servo/update-wptrunner, r=jdm
Fix image_dynamic_remove reftest with incremental layout turned out

This also adds some extra debugging infrastructure which I found useful tracking
this bug down. A regression in the br reftests is also uncovered by this patch,
which I'll work on fixing next.

r? @pcwalton
Fixed the inline_element_border_a reftest with incremental layout turned on.