ninja: Pass -rpath-link when passing -rpath.

ninja: Pass -rpath-link when passing -rpath.

Gold works fine without -rpath-link, but GNU ld needs it. The make generator already does this.
To quote the previous make generator CL:
"it appears that ld.bfd is not $ORIGIN-aware and needs additional information to figure out where to find shared libraries that shared libraries depend on"
Committed: https://code.google.com/p/gyp/source/detail?r=1580

[Lei Zhang, 2013-02-21 21:42:49]

Gold works fine without this, but GNU ld needs it. The make generator already
does this. (dpranke added it a while back)

I suspect nobody else ran into this because they all use ninja + gold.

[Evan Martin, 2013-02-21 21:47:21]

reviewer pet peeve nit: can you put the "why" (what you wrote in your message)
into your the description? :)

[Lei Zhang, 2013-02-21 21:51:43]

On 2013/02/21 21:47:21, Evan Martin wrote:
> reviewer pet peeve nit: can you put the "why" (what you wrote in your message)
> into your the description? :)

Done.

[Evan Martin, 2013-02-21 22:01:21]

LGTM

[Dirk Pranke, 2013-02-21 22:29:32]

lgtm as well.

[Lei Zhang, 2013-02-21 22:40:11]

Committed patchset #1 manually as r1580 (presubmit successful).