Avoid trying to decode the raw inline constant which is part of the aged code prologue.

src/arm/constants-arm.h

Index: src/arm/constants-arm.h
diff --git a/src/arm/constants-arm.h b/src/arm/constants-arm.h
index 703613932cd064f34dbf5773acdb4acd3daf43d4..78bb66c49fe315cbda1e10bd1a9aa6f8f2e0ad38 100644
--- a/src/arm/constants-arm.h
+++ b/src/arm/constants-arm.h
@@ -50,6 +50,9 @@ inline int DecodeConstantPoolLength(int instr) {
   return ((instr >> 4) & 0xfff0) | (instr & 0xf);
 }
 
+// Used in code age prologue - ldr(pc, MemOperand(pc, -4))
+const int kCodeAgeJumpInstruction = 0xe51ff004;
+
 // Number of registers in normal ARM mode.
 const int kNumRegisters = 16;