[Buildroot] autobuild fixes

[Brendan Heading]

Hi Thomas,

Do you (or one of the other committers) expect to have a chance to
commit some of the outstanding autobuild fixes ? Quite a few have been
submitted in over the past few days.

Also - can you look at bumping the autobuilder's musl release ? They
recently went to version 1.11 and this fixes a problem where syncfs()
incorrectly returned void instead of int (which causes coreutils to
fail).

regards

Brendan