[NaCl SDK] nacl_io: Rename termios entry points.

[NaCl SDK] nacl_io: Rename termios entry points.

This allows us to clearly distinguish between entry
points that are part of termios and the top level
ones which are trying eliminate (by moving them to
the C libraries).

Committed: https://crrev.com/6c12b9c55841c8b0d1f087a232a16662eac7251d
Cr-Commit-Position: refs/heads/master@{#299032}

[Sam Clegg, 2014-10-08 18:36:01]

sbc@chromium.org changed reviewers:
+ binji@chromium.org

[binji, 2014-10-08 19:07:20]

lgtm

[Sam Clegg, 2014-10-10 01:03:26]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2014-10-10 01:05:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/639113002/1

[commit-bot: I haz the power, 2014-10-10 01:21:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-10 02:04:50]

Patchset 1 (id:??) landed as
https://crrev.com/6c12b9c55841c8b0d1f087a232a16662eac7251d
Cr-Commit-Position: refs/heads/master@{#299032}