Fix textual emission of label instructions in ARM assembler.

Fix textual emission of label instructions in ARM assembler.

The integrated ARM assembler was incorrectly assuming that an
(instruction) label defines a corresponding assembler instruction.
Therefore, placement into the buffer was incorrect.

This CL fixes this mistake. This fixes assembler translator problems
with ARM branch, movw, and movt instructions.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
R=stichnot@chromium.org

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=5b004e30f5a54c88075e38a4c4854f3d83ce5e7d

[Karl, 2015-11-05 16:52:33]

Description was changed from

==========
Fix textual emission of label instructions in ARM assembler.

The integrated ARM assembler was incorrectly assuming that an
(instruction) label defines a corresponding assembler instruction.
Therefore, placement into the buffer was incorrect.

This CL fixes this mistake. This fixes assembler translator problems
with ARM branch, movw, and movt instructions.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
==========

to

==========
Fix textual emission of label instructions in ARM assembler.

The integrated ARM assembler was incorrectly assuming that an
(instruction) label defines a corresponding assembler instruction.
Therefore, placement into the buffer was incorrect.

This CL fixes this mistake. This fixes assembler translator problems
with ARM branch, movw, and movt instructions.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4334
==========

[Karl, 2015-11-05 16:52:33]

kschimpf@google.com changed reviewers:
+ jpp@chromium.org, sehr@chromium.org, stichnot@chromium.org

[Jim Stichnoth, 2015-11-06 00:34:39]

LGTM.  It would also be great if this enables you to remove "-unsafe-ias" from
any of the lit tests.

[Karl, 2015-11-06 16:52:45]

Committed patchset #2 (id:20001) manually as
5b004e30f5a54c88075e38a4c4854f3d83ce5e7d (presubmit successful).

[Karl, 2015-11-06 16:53:40]

Removed -unsafe-ias from 4 tests.