Rename Interface to ModuleDescriptor

Rename Interface to ModuleDescriptor

ModuleDescriptor will end up holding the set of data described in the
spec as a "Module record". This introduces a little bit of confusion
with ModuleInfo, but I hope that'll become clearer over time.

Also removed the interface-printing flags. We probably want
Module-printing flags, but that can wait until we have more
Module-related structures.

BUG=v8:1569
LOG=n

Committed: https://crrev.com/27e8a455df96311db6fb3b50fb3b371e72a61eca
Cr-Commit-Position: refs/heads/master@{#26728}

[adamk, 2015-02-17 23:19:37]

adamk@chromium.org changed reviewers:
+ rossberg@chromium.org

[rossberg, 2015-02-18 07:39:20]

lgtm

[adamk, 2015-02-18 18:18:34]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2015-02-18 18:19:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/935723004/1

[commit-bot: I haz the power, 2015-02-18 18:25:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-18 18:25:30]

Patchset 1 (id:??) landed as
https://crrev.com/27e8a455df96311db6fb3b50fb3b371e72a61eca
Cr-Commit-Position: refs/heads/master@{#26728}