Add ragel to third_party.

Add ragel to third_party.

Different versions of ragel produce slightly different versions
of generated code and we commit this code to repository.

To stop endless churn it's better to commit one single prebuilt
version of ragel to the repo.

Includes ragel sources, prebuilt binary and script which builds
said binary.

Additionally this version includes -GT2 patch which produces
faster code on MSVC 2008/2010.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=2597
TEST=none
Committed: https://src.chromium.org/viewvc/native_client?view=rev&revision=8673

[pasko-google - do not use, 2012-05-13 15:40:01]

Maybe you wanted to solve other problems with this in the future that you did
not mention here?

Endless churn can be solved by separating scons targets dfa_valgen and valgen.
Good enough. Smaller checkout.

[khim, 2012-05-13 15:56:49]

I meant different kind of churn: different versions of Ragel produce slightly
different output (this is common situation with all generators).

If different systems will use different versions of ragel and commit these files
then we'll get a lot of spurious changes there. valgen/dfagen separation will
not help here, but addition of one canonical version of ragel will.

[pasko-google - do not use, 2012-05-13 16:05:05]

On 2012/05/13 15:56:49, khim wrote:
> I meant different kind of churn: different versions of Ragel produce slightly
> different output (this is common situation with all generators).
> 
> If different systems will use different versions of ragel and commit these
files
> then we'll get a lot of spurious changes there. valgen/dfagen separation will
> not help here, but addition of one canonical version of ragel will.

yeah, for the purpose of the security review we would want to make the generated
files more reproducible. And generally reproduce-ability is good. So please talk
to Mark if he likes running prebuilt binaries. Then I'd probably approve this.

BTW, the bug link is wrong

[pasko-google - do not use, 2012-05-13 16:36:15]

I am OK with the general approach. If Mark has feedback/concerns on this, I'd be
happy to talk.

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/COPYING
File ragel/COPYING (right):

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/COPYING#newcode1
ragel/COPYING:1: GNU GENERAL PUBLIC LICENSE
eol-style should be native unless it does not work with that

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/LICENSE
File ragel/LICENSE (right):

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/LICENSE#newcode1
ragel/LICENSE:1: Copyright 2008, Google Inc.
really? re-licensing the whole thing?

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/README.chromium
File ragel/README.chromium (right):

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/README.chromium#...
ragel/README.chromium:18: all major Linux distributions.
...that have ia32-libs installed

I am too lazy to rephrase it fully, suggest to leave this:
This is a 32bit version prebuilt on Ubuntu Lucid.

[khim, 2012-05-13 16:40:28]

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/COPYING
File ragel/COPYING (right):

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/COPYING#newcode1
ragel/COPYING:1: GNU GENERAL PUBLIC LICENSE
On 2012/05/13 16:36:15, pasko wrote:
> eol-style should be native unless it does not work with that

Done.

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/LICENSE
File ragel/LICENSE (right):

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/LICENSE#newcode1
ragel/LICENSE:1: Copyright 2008, Google Inc.
This for the script, but you are probably correct: script it too simple warrant
that.

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/README.chromium
File ragel/README.chromium (right):

https://chromiumcodereview.appspot.com/10383152/diff/1/ragel/README.chromium#...
ragel/README.chromium:18: all major Linux distributions.
On 2012/05/13 16:36:15, pasko wrote:
> ...that have ia32-libs installed
> 
> I am too lazy to rephrase it fully, suggest to leave this:
> This is a 32bit version prebuilt on Ubuntu Lucid.

Done.

[khim, 2012-05-13 16:57:16]

Whatever. Issue closed.

[bradn, 2012-05-22 17:02:04]

This must go in
http://src.chromium.org/viewvc/native_client/trunk/deps/third_party/
Proceed manually with svn.

[bradn, 2012-05-22 17:14:54]

LGTM (assuming commited to svn://svn.chromium.org/chrome/trunk/deps/third_party
instead.