Fix install-chroot.sh for recent versions of ubuntu

Fix install-chroot.sh for recent versions of ubuntu

Recent version of ubuntu such as trusty and saucy
and have a newer version of schroot.  The change
teaches install-chroot.sh about the differences.

Also, remove --no-lib32 argument to install-build-deps
which no longer exists (means this script has been
broken for quite a while now).

TEST=install precise32bit chroot and build chrome within it
BUG=410101
Committed: https://crrev.com/fdfaf8fa0c1879ff9557172b7f433747fa7355a9
Cr-Commit-Position: refs/heads/master@{#336594}

[Sam Clegg, 2015-06-09 19:06:08]

sbc@chromium.org changed reviewers:
+ dpranke@chromium.org, mmoss@chromium.org

[Dirk Pranke, 2015-06-09 19:07:30]

rubber-stamp lgtm w/ mmoss' approval.

[Michael Moss, 2015-06-09 19:43:49]

lgtm

[Sam Clegg, 2015-06-29 18:06:08]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2015-06-29 18:06:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1173713002/20001

[commit-bot: I haz the power, 2015-06-29 18:18:28]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-29 18:20:26]

Patchset 2 (id:??) landed as
https://crrev.com/fdfaf8fa0c1879ff9557172b7f433747fa7355a9
Cr-Commit-Position: refs/heads/master@{#336594}