[libc] Remove shadow.h support Change-Id: I8c95769a30323de63d9711c910c89a468fa0b8ed
[musl] Remove utmp and utmpx interfaces Change-Id: I0820b4b8fe37a978b95accb6b3b254031280ebec
[musl] Use #pragma once in musl's public headers Like the prior commit, this only replaces existing ifdef guards. Change-Id: I39be129111db9f129aef72a53f986ce6a49376ac
[magenta] Initial commit