AIX: Update variable name which conflicts with system defined variable

AIX: Update variable name which conflicts with system defined variable

    variable hz is defined as a macro in AIX system header
    /usr/include/sys/m_param.h (as "ticks per second of the clock").
    The pre-processor replaces hz with the numeric value defined in
    system header file and therefore emits an error.
    Re-naming variable name to "iz".

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Committed: https://crrev.com/37538cb2c1b4d75c41af386cb4fedbe5566f5608
Cr-Commit-Position: refs/heads/master@{#37308}

[JaideepBajwa, 2016-06-27 17:25:53]

PTAL

[Benedikt Meurer, 2016-06-28 04:38:04]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-06-28 04:38:04]

lgtm

[commit-bot: I haz the power, 2016-06-28 04:38:11]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-06-28 05:04:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-28 05:06:39]

Description was changed from

==========
AIX: Update variable name which conflicts with system defined variable

    variable hz is defined as a macro in AIX system header
    /usr/include/sys/m_param.h (as "ticks per second of the clock").
    The pre-processor replaces hz with the numeric value defined in
    system header file and therefore emits an error.
    Re-naming variable name to "iz".

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N
==========

to

==========
AIX: Update variable name which conflicts with system defined variable

    variable hz is defined as a macro in AIX system header
    /usr/include/sys/m_param.h (as "ticks per second of the clock").
    The pre-processor replaces hz with the numeric value defined in
    system header file and therefore emits an error.
    Re-naming variable name to "iz".

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Committed: https://crrev.com/37538cb2c1b4d75c41af386cb4fedbe5566f5608
Cr-Commit-Position: refs/heads/master@{#37308}
==========

[commit-bot: I haz the power, 2016-06-28 05:06:40]

Patchset 1 (id:??) landed as
https://crrev.com/37538cb2c1b4d75c41af386cb4fedbe5566f5608
Cr-Commit-Position: refs/heads/master@{#37308}