[BOLT] Verify exceptions action table equivalence in ICF

Summary:
Some functions may have exactly the same code and exception handlers.
However, their action tables could be different leading to mismatching
semantics. We should verify their equivalence while running ICF.

(cherry picked from FBD20889035)

bolt/src/Passes/IdenticalCodeFolding.cpp

@@ -289,6 +289,13 @@ bool isIdenticalWith(const BinaryFunction &A, const BinaryFunction &B,
     ++BBI;
   }
 
+  // Compare exceptions action tables.
+  if (A.getLSDAActionTable() != B.getLSDAActionTable() ||
+      A.getLSDATypeTable() != B.getLSDATypeTable() ||
+      A.getLSDATypeIndexTable() != B.getLSDATypeIndexTable()) {
+    return false;
+  }
+
   return true;
 }