Add a status message for generating test files

The configuration step of generating the output match conditions for tests
to pass takes a little while, so we add a status message to tell the user
what's going on.

Review-URL: https://codereview.appspot.com/312340043

suite/tests/CMakeLists.txt

@@ -1,5 +1,5 @@
 # **********************************************************
-# Copyright (c) 2010-2016 Google, Inc.    All rights reserved.
+# Copyright (c) 2010-2017 Google, Inc.    All rights reserved.
 # Copyright (c) 2009-2010 VMware, Inc.    All rights reserved.
 # Copyright (c) 2016      ARM Limited.    All rights reserved.
 # **********************************************************
@@ -1500,6 +1500,9 @@ endfunction(optimize)
 ###########################################################################
 # tests
 
+# This step takes a while so we provide a status message:
+message(STATUS "Processing tests and generating expected output patterns")
+
 tobuild(common.broadfun common/broadfun.c)
 if (NOT ANDROID) # We do not support -no_early_inject on Android (i#1873).
   tobuild_ops(common.fib common/fib.c "-no_early_inject" "")