gn help switches doc fixup

gn help switches doc fixup

GN docs refer to "gn help" for common command-line switches in a couple
of places, but that only shows the top level help.  The reference
should of course be "gn help switches".

Committed: https://crrev.com/56807c6cb383140af0c03da8f6731d77785d7160
Cr-Commit-Position: refs/heads/master@{#349215}

[Mostyn Bramley-Moore, 2015-09-16 07:37:33]

mostynb@opera.com changed reviewers:
+ brettw@chromium.org

[Mostyn Bramley-Moore, 2015-09-16 07:37:33]

@brettw: here's another small doc fixup.

[Mostyn Bramley-Moore, 2015-09-16 07:37:54]

The CQ bit was checked by mostynb@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2015-09-16 07:38:06]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1348633002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1348633002/1

[commit-bot: I haz the power, 2015-09-16 07:48:04]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-16 07:48:05]

Dry run: Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[brettw, 2015-09-16 20:25:51]

LGTM, thanks!

[brettw, 2015-09-16 20:30:38]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-09-16 20:32:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1348633002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1348633002/1

[commit-bot: I haz the power, 2015-09-16 20:45:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-16 20:45:41]

Patchset 1 (id:??) landed as
https://crrev.com/56807c6cb383140af0c03da8f6731d77785d7160
Cr-Commit-Position: refs/heads/master@{#349215}