Mark cctests that don't use deprecated APIs as such

test/cctest/gay-fixed.cc

Index: test/cctest/gay-fixed.cc
diff --git a/test/cctest/gay-fixed.cc b/test/cctest/gay-fixed.cc
index 86ebb24cd8d7172f8c5af73a76dcba34d5221037..ad41e600d2aa30c48c58c84bbc3c138d96588713 100644
--- a/test/cctest/gay-fixed.cc
+++ b/test/cctest/gay-fixed.cc
@@ -29,6 +29,9 @@
 // have been generated using Gay's dtoa to produce the fixed representation:
 //         dtoa(v, 3, number_digits, &decimal_point, &sign, NULL);
 
+// TODO(jochen): Remove this after the setting is turned on globally.
+#define V8_IMMINENT_DEPRECATION_WARNINGS
+
 #include "src/v8.h"
 
 #include "test/cctest/gay-fixed.h"