Delete source/test

Delete source/test

We don't use source/test. It's kept to give API usage examples, but
it got in the way of a version update (git cl upload keeps timing out).

Also, update update.sh to delete source/test after downloading a new
version from the upstream.

BUG=637001
TEST=None

Committed: https://chromium.googlesource.com/chromium/deps/icu/+/2e57f5552b7244b56a3f9a4f0d9ac89ca137479b

[jungshik at Google, 2016-10-21 18:35:36]

Description was changed from

==========
Delete source/test

We don't use source/test. It's kept to give API usage examples, but
it got in the way of a version update (git cl upload keeps timing out).

Also, update update.sh to delete source/test after downloading a new
version from the upstream.

BUG=637001
TEST=None
==========

to

==========
Delete source/test

We don't use source/test. It's kept to give API usage examples, but
it got in the way of a version update (git cl upload keeps timing out).

Also, update update.sh to delete source/test after downloading a new
version from the upstream.

BUG=637001
TEST=None

Committed:
https://chromium.googlesource.com/chromium/deps/icu/+/2e57f5552b7244b56a3f9a4...
==========

[jungshik at Google, 2016-10-21 18:35:45]

Committed patchset #1 (id:1) manually as
2e57f5552b7244b56a3f9a4f0d9ac89ca137479b (presubmit successful).