GN: Fix gn gen/compile errors for MIPS

GN: Fix gn gen/compile errors for MIPS

Fixing two errors:
 - ERROR Unresolved dependencies.
   //:gn_only(//build/toolchain/linux:mipsel)
   needs //third_party/libjpeg_turbo:simd_asm(//build/toolchain/linux:mipsel)
 by including //third_party/libjpeg_turbo:simd_asm target
 only for x86 and x64, where it exists
 - incompatible pointer types in usrsctp
 by ignoring warnings for this module

TEST=gn gen out/mips-linux --args="is_debug=false target_os=\"linux\" target_cpu=\"mipsel\" is_clang=false"
     ninja -C out/mips-linux/ chrome

Committed: https://crrev.com/85746ff1e58b5695f15e61ff5fde46c64d22b4ca
Cr-Commit-Position: refs/heads/master@{#327245}

[gordanac, 2015-04-23 16:05:49]

gordana.cmiljanovic@imgtec.com changed reviewers:
+ dpranke@chromium.org, ldixon@chromium.org

[gordanac, 2015-04-23 16:25:32]

Please take a look.

gn gen error can be seen at [1].


[1]
http://www.rt-rk.com/mips-buildbot/builders/Chromium_linux_GN/builds/226/step...

[ldixon, 2015-04-23 17:43:57]

ldixon@google.com changed reviewers:
+ ldixon@google.com

[ldixon, 2015-04-23 17:43:58]

lgtm

I don't know much about gn; but it looks like a minor change and it makes sense
to ignore warnings for usrsctp. 

LGTM

[Dirk Pranke, 2015-04-23 22:18:47]

lgtm

[Dirk Pranke, 2015-04-23 22:22:29]

Cool, I didn't realize y'all had your own public buildbot ...

Would it be possible for me to get a list of the different build configs you
use? Your build logs don't make them immediately obvious.

[gordanac, 2015-04-24 09:07:33]

The CQ bit was checked by gordana.cmiljanovic@imgtec.com

[commit-bot: I haz the power, 2015-04-24 09:07:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1094793004/1

[commit-bot: I haz the power, 2015-04-24 09:13:39]

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

[commit-bot: I haz the power, 2015-04-24 09:13:40]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[gordanac, 2015-04-24 09:53:39]

gordana.cmiljanovic@imgtec.com changed reviewers:
+ gordana.cmiljanovic@imgtec.com
- Gordana.Cmiljanovic@imgtec.com

[gordanac, 2015-04-24 09:58:26]

On 2015/04/24 09:13:40, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
>
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

@ldixon, 
presubmit check failed, I think I need approval from your @chromium.com address.

[gordanac, 2015-04-27 17:28:53]

On 2015/04/24 09:58:26, gordanac wrote:
> On 2015/04/24 09:13:40, I haz the power (commit-bot) wrote:
> > Try jobs failed on following builders:
> >   chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
> >
>
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
> 
> @ldixon, 
> presubmit check failed, I think I need approval from your @chromium.com
address.

@ldixon, 
just a friendly ping.

[Lucas Dixon, 2015-04-27 20:46:49]

On 2015/04/27 17:28:53, gordanac wrote:
> On 2015/04/24 09:58:26, gordanac wrote:
> > On 2015/04/24 09:13:40, I haz the power (commit-bot) wrote:
> > > Try jobs failed on following builders:
> > >   chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
> > >
> >
>
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
> > 
> > @ldixon, 
> > presubmit check failed, I think I need approval from your @chromium.com
> address.
> 
> @ldixon, 
> just a friendly ping.

LGTM (although I'm not sure I've the privileges you need... if I don't, I think
pthatcher@chromium.org does )

[gordanac, 2015-04-28 08:01:30]

The CQ bit was checked by gordana.cmiljanovic@imgtec.com

[commit-bot: I haz the power, 2015-04-28 08:02:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1094793004/1

[commit-bot: I haz the power, 2015-04-28 08:17:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-28 08:18:19]

Patchset 1 (id:??) landed as
https://crrev.com/85746ff1e58b5695f15e61ff5fde46c64d22b4ca
Cr-Commit-Position: refs/heads/master@{#327245}

[gordanac, 2015-04-28 08:39:02]

On 2015/04/27 20:46:49, Lucas Dixon wrote:
> On 2015/04/27 17:28:53, gordanac wrote:
> > On 2015/04/24 09:58:26, gordanac wrote:
> > > On 2015/04/24 09:13:40, I haz the power (commit-bot) wrote:
> > > > Try jobs failed on following builders:
> > > >   chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
> > > >
> > >
> >
>
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)
> > > 
> > > @ldixon, 
> > > presubmit check failed, I think I need approval from your @chromium.com
> > address.
> > 
> > @ldixon, 
> > just a friendly ping.
> 
> LGTM (although I'm not sure I've the privileges you need... if I don't, I
think
> mailto:pthatcher@chromium.org does )

Thank you, you are in OWNERS list :)