Fixes and enables FindCodeObject test for dbc

Fixes and enables FindCodeObject test for dbc

DBC always encodes branches similarly to arm64's far branches. In
particular, the unconditional jump takes a signed 26-bit offset.
This CL just modifies the test to generate enough code to test that
dbc can handle branches the same distance as the other platforms.

R=iposva@google.com

Committed: https://github.com/dart-lang/sdk/commit/db86be4901f39ad913ce1b0f459a25e20eca366a

[zra, 2016-04-26 17:30:46]

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

[Ivan Posva, 2016-04-26 17:38:53]

LGTM -ip

[zra, 2016-04-26 17:40:31]

Description was changed from

==========
Fixes and enables FindCodeObject test for dbc

DBC always encodes branches similarly to arm64's far branches. In
particular, the unconditional jump takes a signed 26-bit offset.
This CL just modifies the test to generate enough code to test that
dbc can handle branches the same distance as the other platforms.
==========

to

==========
Fixes and enables FindCodeObject test for dbc

DBC always encodes branches similarly to arm64's far branches. In
particular, the unconditional jump takes a signed 26-bit offset.
This CL just modifies the test to generate enough code to test that
dbc can handle branches the same distance as the other platforms.

R=iposva@google.com

Committed:
https://github.com/dart-lang/sdk/commit/db86be4901f39ad913ce1b0f459a25e20eca366a
==========

[zra, 2016-04-26 17:40:33]

Committed patchset #1 (id:1) manually as
db86be4901f39ad913ce1b0f459a25e20eca366a (presubmit successful).