Solaris toolchains in dist-various-2 no longer compile

[alexcrichton]

First discovered here the full logs are at 583.txt.

Looks like something may have changed, and my guess guess is something in the ubuntu packages but I'm not entirely sure.

cc @bgermann, we're gonna need to temporarily disable this target but figured you'd want to know!

[bgermann]

Thanks for keeping me in the loop!