Fail build_autotest.sh if any test fails to build.

Fail build_autotest.sh if any test fails to build.

This change may be controversial -- it will basically make the x86-generic
full buildbot fail if tests fail to build.

There are a few options:

1. do this and see how it goes;
2. don't do this and rely on the test failing to run;
3. do this but also change buildbot to pass --nobuildcheck to build_autotest

[djmm, 2010-03-11 21:50:04]

My feeling is that the buildbots should reflect as much as the end-to-end
build,test,release process as possible and any failure at any point should turn
it red. 

LGTM

[kmixter1, 2010-03-12 00:53:18]

LGTM

On Thu, Mar 11, 2010 at 1:50 PM,  <djmm@chromium.org> wrote:
> My feeling is that the buildbots should reflect as much as the end-to-end
> build,test,release process as possible and any failure at any point should
> turn
> it red.
>
> LGTM
>
> http://codereview.chromium.org/848005
>