Fix previous CL where dart_bootstrap was accidently changed to dart_bootstrap_host_arch

Fix previous CL where dart_bootstrap was accidently changed to dart_bootstrap_host_arch.

Also fix two missed places where host_toolchain should be replaced with dart_host_toolchain.

R=rmacnak@google.com

BUG:flutter/flutter#10841
Committed: https://github.com/dart-lang/sdk/commit/4f9b25e410ed63028945e47386b434ed8cd8c313

[aam, 2017-06-22 20:06:20]

aam@google.com changed reviewers:
+ rmacnak@google.com

[aam, 2017-06-22 20:06:20]

PTAL, thanks!

[aam, 2017-06-22 20:11:09]

Description was changed from

==========
Fix previous CL where dart_bootstrap was accidently changed to
dart_bootstrap_host_arch

BUG:flutter/flutter#10841
==========

to

==========
Fix previous CL where dart_bootstrap was accidently changed to
dart_bootstrap_host_arch.

Also fix two missed places where host_toolchain should be replaced with
dart_host_toolchain.

BUG:flutter/flutter#10841
==========

[aam, 2017-06-22 20:11:35]

aam@google.com changed reviewers:
+ zra@google.com

[rmacnak, 2017-06-22 20:16:44]

lgtm

[aam, 2017-06-22 20:17:57]

Description was changed from

==========
Fix previous CL where dart_bootstrap was accidently changed to
dart_bootstrap_host_arch.

Also fix two missed places where host_toolchain should be replaced with
dart_host_toolchain.

BUG:flutter/flutter#10841
==========

to

==========
Fix previous CL where dart_bootstrap was accidently changed to
dart_bootstrap_host_arch.

Also fix two missed places where host_toolchain should be replaced with
dart_host_toolchain.

R=rmacnak@google.com

BUG:flutter/flutter#10841
Committed:
https://github.com/dart-lang/sdk/commit/4f9b25e410ed63028945e47386b434ed8cd8c313
==========

[aam, 2017-06-22 20:17:58]

Committed patchset #2 (id:20001) manually as
4f9b25e410ed63028945e47386b434ed8cd8c313 (presubmit successful).