deps: updated libuv to 1.2.1

[saghul]

We made quite some bugfixes and uv_try_write got implemented on Windows, which improves the writes performance. API is backwards compatible and ABI hasn't changed.

R=@tjfontaine, @cjihrig

This should close #8988

[saghul]

Oh, tests do pass locally (Linux), I hope Jenkins agrees :-)

[cjihrig]

Rubber stamp LGTM. Let's see what Jenkins says.

[cjihrig]

Oh, and @tjfontaine does this need to wait or can it go in 0.12?

[misterdjules]

In my opinion, we should land that post 0.11.15 now that we closed all outstanding issues/PRs in this milestone and the build is all green.

[saghul]

Gentle reminder, now that 0.11.15 is out :-)

[tjfontaine]

We're pretty long in the tooth in the process towards releasing v0.12 -- upgrading libuv at this point is too much change before we release. I would prefer we push this to master.

[saghul]

@tjfontaine While I understand, don't let the version number deceive you, it's not a major upgrade. We now follow semver so we had to bump the minor twice because a couple of new (small) features where added.

FWIW, iojs has run all releases since 1.0 and thanks to that we were able to fix a couple of regressions like #8988. If you ship Node with 1.0 #8988 is broken.

[misterdjules]

Adding it to the 0.12.1 milestone, even though a more recent version of libuv than 1.2.1 might be preferable at that time. Thank you @saghul for your help and support.

[saghul]

@misterdjules no worries. I'll update this PR with 1.3.0 in the upcoming days.

[saghul]

I opened a new PR here: #9165 since I cannot the change the title of this one, and it would be misleading.

[misterdjules]

Cleared the 0.12.1 milestone since it never landed and has been superseded by #9179.