Add support for AIX

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/init.c b/init.c
index 09b9152..c3fe88f 100644
--- a/init.c
+++ b/init.c
@@ -8,7 +8,6 @@
 #include <ctype.h>
 #include <string.h>
 #include <errno.h>
-#include <getopt.h>
 #include <sys/ipc.h>
 #include <sys/shm.h>
 #include <sys/types.h>
@@ -21,6 +20,8 @@
 #include "verify.h"
 #include "profile.h"
 
+#include "lib/getopt.h"
+
 static char fio_version_string[] = "fio 1.42";
 
 #define FIO_RANDSEED		(0xb1899bedUL)