Add builder for Solaris and merge it with Fuchsia's builder

[bgermann]

The new Solaris builder can be used to build rust-std.

The dilos illumos distribution was chosen, because illumos is free software
as opposed to Oracle Solaris and dilos is the only illumos distribution that
supports x86_64 and sparcv9 at the same level.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @alexcrichton (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[bgermann]

@alexcrichton Is there anything left that I can do to enable official rust-std builds for sparcv9-sun-solaris and x86_64-sun-solaris (and them being available in rustup)?

[alexcrichton]

Thanks for the PR @bgermann! In terms of getting these available through rustup that'd basically require adding some form of a dist builder on Travis. Unfortunately adding entire new builders typically requires a big investment (we haven't done this in awhile) but if you can squeeze onto an existing builder then it normally works well.

It looks like you're just looking for the standard libraries here which are "easy" to build in the sense that they don't consume many resources. It looks like our cross builder is getting a little full at 1h44m as the last cycle time, but we could consider folding the dist-fuchsia builder into this builder as well (maybe even with the android builder if we're enterprising?)

[bgermann]

You are right, I'm only looking for the standard libraries. To merge with dist-fuchsia sounds reasonable. Which name should the merged Docker environment have?

[alexcrichton]

How about cross2

[alexcrichton]

@bgermann Looks great! Could you also test out deleting the if: branch = auto temporarily? That'll allow us to see how long timing-wise this should take and ensure the builder passes before it reaches bors

[alexcrichton]

@bors: r+

Awesome, thanks @bgermann!

[bors]

📌 Commit dba52ff has been approved by alexcrichton

[malbarbo]

@bgermann Great work, thanks! Do you know cross project? Maybe you can add support for cross compiling to sparc. It would be awesome.

[bgermann]

I will have a look at it.

[bors]

⌛ Testing commit dba52ff with merge 108706f...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: alexcrichton
Pushing 108706f to master...