[fast-int] Set four-byte sidetable entry by default

src/engine/Tuning.v3

@@ -30,7 +30,7 @@ component FastIntTuning {
 	def skipRepeatedBlocks = true;	// skip repeated BLOCK bytecodes
 	def dispatchEntrySize = 4;	// size of each dispatch table entry
 	def inlineAllLEBs = false;	// always inline LEB slow cases
-	def fourByteSidetable = false;  // sidetable entries are 4-bytes
+	def fourByteSidetable = true;	// sidetable entries are 4-bytes
 	def entryTierUpDecrement = 1;	// "cost" of entering a function in the interpreter
 	def loopTierUpDecrement = 1;	// "cost" of looping in the interpreter
 }