Make --no-prompt --lib32 install lib32 support.

Make --no-prompt --lib32 install lib32 support.

BUG=297984, 299075
TEST=local

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=226060

[Peter Mayo, 2013-09-27 04:48:45]

https://chromiumcodereview.appspot.com/24961002/diff/1/build/install-build-de...
File build/install-build-deps.sh (right):

https://chromiumcodereview.appspot.com/24961002/diff/1/build/install-build-de...
build/install-build-deps.sh:161: # Some packages are only needed if the
distribution actually supports
This is just a little readability tweak.

https://chromiumcodereview.appspot.com/24961002/diff/1/build/install-build-de...
build/install-build-deps.sh:175: [ $1 -eq 0 ] && echo "Y" || echo "N"
Prompt messages in a log that are unclear how they were answered are obnoxiously
useless.

[Michael Moss, 2013-09-27 16:23:43]

lgtm

[commit-bot: I haz the power, 2013-09-27 17:20:48]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/petermayo@chromium.org/24961002/1

[commit-bot: I haz the power, 2013-09-27 19:07:47]

Retried try job too often on linux_aura for step(s) unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_aura...

[commit-bot: I haz the power, 2013-09-30 15:47:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/petermayo@chromium.org/24961002/1

[commit-bot: I haz the power, 2013-09-30 22:07:08]

Change committed as 226060