Add zlib dependency for dart_bootstrap build

Add zlib dependency for dart_bootstrap build

The Dartium build does not include io components in the libraries, which
are what pull in zlib for the non-dartium builds of the SDK.  But it does
build dart_bootstrap, which needs zlib.  It actually should not need to
build dart_bootstrap, since it is useless without io capabilities.

BUG=
R=kasperl@google.com

Committed: https://github.com/dart-lang/sdk/commit/f425c829858565e6a4e21b32d6baf796303a937a

[Bill Hesse, 2016-03-04 10:37:22]

whesse@google.com changed reviewers:
+ iposva@google.com, kasperl@google.com

[kasperl, 2016-03-04 11:28:30]

LGTM. Thanks for trying to make the bots greener, Bill!

[Bill Hesse, 2016-03-04 12:15:46]

Description was changed from

==========
Add zlib dependency for dart_bootstrap build

The Dartium build does not include io components in the libraries, which
are what pull in zlib for the non-dartium builds of the SDK.  But it does
build dart_bootstrap, which needs zlib.  It actually should not need to
build dart_bootstrap, since it is useless without io capabilities.

BUG=
==========

to

==========
Add zlib dependency for dart_bootstrap build

The Dartium build does not include io components in the libraries, which
are what pull in zlib for the non-dartium builds of the SDK.  But it does
build dart_bootstrap, which needs zlib.  It actually should not need to
build dart_bootstrap, since it is useless without io capabilities.

BUG=
R=kasperl@google.com

Committed:
https://github.com/dart-lang/sdk/commit/f425c829858565e6a4e21b32d6baf796303a937a
==========

[Bill Hesse, 2016-03-04 12:15:48]

Committed patchset #1 (id:1) manually as
f425c829858565e6a4e21b32d6baf796303a937a.

[Ivan Posva, 2016-03-04 18:01:31]

Bill,

Thanks for the quick fix. I will fix the use of zlib in dart_bootstrap, which is
not needed and will be removed.

-Ivan