Fix bug in an OpenACC async test case

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/data-2-lib.c: Add missing
	call to acc_wait (1).

From-SVN: r255308

libgomp/ChangeLog

+2017-12-01  Cesar Philippidis  <cesar@codesourcery.com>
+
+	* testsuite/libgomp.oacc-c-c++-common/data-2-lib.c: Add missing
+	call to acc_wait (1).
+
 2017-11-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR fortran/81304

libgomp/testsuite/libgomp.oacc-c-c++-common/data-2-lib.c

@@ -64,6 +64,8 @@ main (int argc, char **argv)
   for (i = 0; i < N; i++)
     b[i] = a[i];
 
+  acc_wait (1);
+
   acc_memcpy_from_device (a, d_a, nbytes);
   acc_memcpy_from_device (b, d_b, nbytes);