glibc and musl both have these as synonyms for one another, so we may as well do the same and get backwards compatibility on old OS releases. Bug: N/A Test: ran tests Change-Id: I6bf38ea446560e1b11022ff539f07eb67c157049
Also remove unneeded declaration of sysconf in <unistd.h>. Bug: http://b/28067717 Change-Id: Ife4692e48ca97480e422db0686c61133e1d619aa