Add Solaris native aio engine

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h
index a155518..b1792ab 100644
--- a/fio.h
+++ b/fio.h
@@ -29,6 +29,10 @@
 #include <guasi.h>
 #endif
 
+#ifdef FIO_HAVE_SOLARISAIO
+#include <sys/asynch.h>
+#endif
+
 enum fio_ddir {
 	DDIR_READ = 0,
 	DDIR_WRITE,
@@ -127,6 +131,9 @@
 #ifdef FIO_HAVE_GUASI
 		guasi_req_t greq;
 #endif
+#ifdef FIO_HAVE_SOLARISAIO
+		aio_result_t resultp;
+#endif
 	};
 	struct timeval start_time;
 	struct timeval issue_time;