libc: resolve minix clang warnings

Change-Id: If6c42f7346cc1b00b387ae8d3b4f0df3ffb0244f
minix libraries: resolve clang warnings

Change-Id: I0f3425fb8838708c9848a006f1eee5ab1bad71d2
Import libevent

Change-Id: Ic75f4cac5eb07ffaba8f97d10673d7d7e2b1762d
libc: enable setproctitle(3)

Change-Id: I31bbc5d960c60f7347424ce3d8f4bce89b396339