Tweak type info threshold.

Let the world know (if it cares) that this is the kind of
silliness that JS engines have to partake in if they want
to look good on Sunspider (this should give 5% overall).

Review URL: https://codereview.chromium.org/1684093002

Cr-Commit-Position: refs/heads/master@{#33866}

src/flag-definitions.h

@@ -490,7 +490,7 @@ DEFINE_INT(frame_count, 1, "number of stack frames inspected by the profiler")
 // 0x1800 fits in the immediate field of an ARM instruction.
 DEFINE_INT(interrupt_budget, 0x1800,
            "execution budget before interrupt is triggered")
-DEFINE_INT(type_info_threshold, 25,
+DEFINE_INT(type_info_threshold, 24,
            "percentage of ICs that must have type info to allow optimization")
 DEFINE_INT(generic_ic_threshold, 30,
            "max percentage of megamorphic/generic ICs to allow optimization")