Use /bin/bash for update_depot_tools.

Use /bin/bash for update_depot_tools.

On at least one platform /usr/bin/env is actually not
a guaranteed method to get to bash.  Fall back to using
/bin/bash for this script.
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=86185

[M-A Ruel, 2011-05-18 19:54:16]

What about using /bin/sh ?

Can you reduce the script so it's plain sh compatible?

[cmp, 2011-05-19 00:04:44]

On 2011/05/18 19:54:16, Marc-Antoine Ruel wrote:
> What about using /bin/sh ?
> 
> Can you reduce the script so it's plain sh compatible?

I changed #! to /bin/sh.  The script works fine on my Lucid system, Mac 10.6.7,
Windows MSys, and Windows Cygwin installs.  Patch updated, PTAL.

[M-A Ruel, 2011-05-19 00:31:58]

lgtm

At worst I'll get hate mail from BSDers.

[cmp, 2011-05-21 00:27:25]

On 2011/05/19 00:31:58, Marc-Antoine Ruel wrote:
> lgtm
> 
> At worst I'll get hate mail from BSDers.

Oops, only just noticed after committing that I should've changed the message to
/bin/sh.  Sorry.

[cmp, 2011-05-23 22:59:39]

I needed to revert this change.  I'm abandoning it since I don't think it's
needed by my other msys changes.  (When the PATH is correct, env is available.)