open_posix:aio_fsync:8-1: wait for aio_write completion

Wait for aio_write() completion.
If aio_fsync() sync the fd without the previous aio_write()
completion, it will cause Segment Fault.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
diff --git a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c
index 4129dcd..3940f62 100644
--- a/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c
+++ b/testcases/open_posix_testsuite/conformance/interfaces/aio_fsync/8-1.c
@@ -27,6 +27,7 @@
 #define BUF_SIZE 111
 	char buf[BUF_SIZE];
 	int fd;
+	int ret;
 	struct aiocb aiocb_write;
 	struct aiocb aiocb_fsync;
 
@@ -57,6 +58,15 @@
 		exit(PTS_FAIL);
 	}
 
+	do {
+		usleep(10000);
+		ret = aio_error(&aiocb_write);
+	} while (ret == EINPROGRESS);
+	if (ret < 0) {
+		printf(TNAME " Error at aio_error() : %s\n", strerror(ret));
+		exit(PTS_FAIL);
+	}
+
 	memset(&aiocb_fsync, 0, sizeof(aiocb_fsync));
 	aiocb_fsync.aio_fildes = fd;
 	aiocb_fsync.aio_nbytes = -1;