Add curl to build/install-build-deps.sh

Add curl to build/install-build-deps.sh

tools/clang/scripts/update.sh tries to use curl to download over https (wget has
issues with this). To make sure curl is installed on new bots, add it to
install-build-deps.sh, so that we can use the https download on bots.

BUG=97288
TEST=none


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=102566

[Nico, 2011-09-23 01:25:08]

The first time I'm editing this file…does this look right?

[tony, 2011-09-23 16:53:27]

Why do developers need curl?  Or is it just for the bots?  Maybe make a mention
of 'why' in the change description.

LGTM

[commit-bot: I haz the power, 2011-09-23 16:55:58]

CQ is trying tha patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/7966029/1

[commit-bot: I haz the power, 2011-09-23 19:05:11]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[commit-bot: I haz the power, 2011-09-23 19:09:29]

CQ is trying tha patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/7966029/1

[commit-bot: I haz the power, 2011-09-23 20:42:40]

Change committed as 102566