Enable (and test) custom dev-mode sounds

BUG=none
TEST=manual

  cd src/platform/vboot_reference
  make && make runtests

Change-Id: I7f7d50d7c9c5541e0b99031245f882996a6b88ec
Reviewed-on: http://gerrit.chromium.org/gerrit/8731
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Tested-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
diff --git a/tests/test_common.h b/tests/test_common.h
index 6f594f9..f5d73d1 100644
--- a/tests/test_common.h
+++ b/tests/test_common.h
@@ -34,6 +34,14 @@
 int TEST_STR_EQ(const char* result, const char* expected_result,
                 const char* testname);
 
+/* Return 1 if the result is true, else return 0.
+ * Also update the global gTestSuccess flag if test fails. */
+int TEST_TRUE(int result, const char* testname);
+
+/* Return 1 if the result is false, else return 0.
+ * Also update the global gTestSuccess flag if test fails. */
+int TEST_FALSE(int result, const char* testname);
+
 /* ANSI Color coding sequences.
  *
  * Don't use \e as MSC does not recognize it as a valid escape sequence.