Run KEYPROTO task during the button unit test

Change 18baa15 made a call to keyboard keyboard_update_button
conditional on running the KEYPROTO task. This call is needed
for the button unit test.

This fixes a test breakage when running "make buildall"

BUG=None
BRANCH=ToT
TEST=Run "make buildall -j32" "make BOARD=glimmer tests -j32"
and "make BOARD=rambi tests -j32" successfully with a
"make clobber" in between.

Signed-off-by: Dave Parker <dparker@chromium.org>

Orig-Change-Id: I6f10577ffd189fee7081aa65cf5adb9075c95373
Reviewed-on: https://chromium-review.googlesource.com/185104
Tested-by: Dave Parker <dparker@chromium.org>
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Queue: Dave Parker <dparker@chromium.org>
(cherry picked from commit c267054850c4b296a364e975063c634f34d701e9)

Change-Id: I92932577e83561530ef288c6ede211fa809962f8
Reviewed-on: https://chromium-review.googlesource.com/185245
Tested-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Randall Spangler <rspangler@chromium.org>

test/button.tasklist

@@ -1,4 +1,4 @@
-/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
@@ -14,4 +14,5 @@
  * 'd' in an opaque parameter passed to the routine at startup
  * 's' is the stack size in bytes; must be a multiple of 8
  */
-#define CONFIG_TEST_TASK_LIST  /* No test task */
+#define CONFIG_TEST_TASK_LIST \
+        TASK_TEST(KEYPROTO, keyboard_protocol_task, NULL, TASK_STACK_SIZE)

test/test_config.h

@@ -84,6 +84,7 @@ int board_discharge_on_ac(int enabled);
 
 #ifdef TEST_BUTTON
 #define CONFIG_BUTTON_COUNT 2
+#define CONFIG_KEYBOARD_PROTOCOL_8042
 #endif
 
 #endif  /* TEST_BUILD */