Telemetry: Don't use the full path to rdmsr on Linux.

Telemetry: Don't use the full path to rdmsr on Linux.

This fixes the bots, even though when I log into the bots and run rdmsr
with the full path through Python, it works fine. This should be ok,
since Ubuntu includes the sbin directories in the path by default.

BUG=336556
Committed: https://crrev.com/d0c9db15b39f1f50c92ed395a3a9677811864b0a
Cr-Commit-Position: refs/heads/master@{#299019}

[Lei Zhang, 2014-10-09 20:26:18]

thestig@chromium.org changed reviewers:
+ dtu@chromium.org

[Lei Zhang, 2014-10-09 20:26:18]

I don't fully understand why this doesn't work as is, but this is the
workaround.

[tonyg, 2014-10-09 20:34:58]

tonyg@chromium.org changed reviewers:
+ tonyg@chromium.org

[tonyg, 2014-10-09 20:34:59]

lgtm

[Lei Zhang, 2014-10-09 20:36:24]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2014-10-09 20:37:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/640323004/1

[dtu, 2014-10-09 20:42:08]

lgtm

[commit-bot: I haz the power, 2014-10-10 00:16:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-10 00:17:34]

Patchset 1 (id:??) landed as
https://crrev.com/d0c9db15b39f1f50c92ed395a3a9677811864b0a
Cr-Commit-Position: refs/heads/master@{#299019}