os/unix/os.c has to have *something* in it, or cc complains about

	it being empty and ld gritches about libos.a not having a directory
	(since ranlib didn't insert an empty one).  [Digial UNIX 3.2, at
	least]


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79146 13f79535-47bb-0310-9956-ffa450edef68