Sort problems.
Sort problems.

Signed-off-by: David Symonds <7f6bb564ed9e580d4f0aa90d53b34578e5d24cb9@golang.org>

golang/lint,zimmski/lint,gorcz/lint,lutzky/lint,kovetskiy/lint,NichoZhang/lint,tmc/lint,darkliquid/lintci