Assign more bits to safepoint table offset.

1 << 24 is apparently not large enough for some optimized code.

R=jkummerow@chromium.org
BUG=v8:4272
LOG=N

Review URL: https://codereview.chromium.org/1265663002

Cr-Commit-Position: refs/heads/master@{#29909}

src/objects.h

@@ -5092,7 +5092,7 @@ class Code: public HeapObject {
 
   // KindSpecificFlags2 layout (STUB and OPTIMIZED_FUNCTION)
   static const int kSafepointTableOffsetFirstBit = kIsCrankshaftedBit + 1;
-  static const int kSafepointTableOffsetBitCount = 24;
+  static const int kSafepointTableOffsetBitCount = 30;
 
   STATIC_ASSERT(kSafepointTableOffsetFirstBit +
                 kSafepointTableOffsetBitCount <= 32);