Auto merge of #1556 - senden9:patch-1, r=gnzlbg
Auto merge of #1556 - senden9:patch-1, r=gnzlbg

Sort targets in documentation. Fixes #1524.

Should be a simple but effective fix for #1524. Assume `sort` command is available.

rust-lang/libc,rust-lang/libc,rust-lang/libc