Subzero: Fix some build problems against LLVM trunk.

Subzero: Fix some build problems against LLVM trunk.

This allows Subzero to build through LLVM e8516587a2604386a8faaab28c410663c2ec884c.

1. Mirror an internal change to the llvm::cl implementation.

2. Something changed in llvm::format() that now requires an explicit conversion from RegNumT.

BUG= none
R=kschimpf@google.com

Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=79810753afd2c8e7b0d04359481fa2ae4dac4bf2

[Jim Stichnoth, 2016-12-26 18:26:17]

Description was changed from

==========
Subzero: Fix some build problems against LLVM trunk.

BUG= none
==========

to

==========
Subzero: Fix some build problems against LLVM trunk.

This allows Subzero to build through LLVM
e8516587a2604386a8faaab28c410663c2ec884c.

1. Mirror an internal change to the llvm::cl implementation.

2. Something changed in llvm::format() that now requires an explicit conversion
from RegNumT.

BUG= none
==========

[Jim Stichnoth, 2016-12-26 18:33:59]

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

[Karl, 2016-12-26 20:16:50]

lgtm

[Jim Stichnoth, 2016-12-26 22:16:02]

Description was changed from

==========
Subzero: Fix some build problems against LLVM trunk.

This allows Subzero to build through LLVM
e8516587a2604386a8faaab28c410663c2ec884c.

1. Mirror an internal change to the llvm::cl implementation.

2. Something changed in llvm::format() that now requires an explicit conversion
from RegNumT.

BUG= none
==========

to

==========
Subzero: Fix some build problems against LLVM trunk.

This allows Subzero to build through LLVM
e8516587a2604386a8faaab28c410663c2ec884c.

1. Mirror an internal change to the llvm::cl implementation.

2. Something changed in llvm::format() that now requires an explicit conversion
from RegNumT.

BUG= none
R=kschimpf@google.com

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

[Jim Stichnoth, 2016-12-26 22:16:03]

Committed patchset #2 (id:20001) manually as
79810753afd2c8e7b0d04359481fa2ae4dac4bf2 (presubmit successful).