Abiv2 isabelle: Add fuzzer test harness skeleton and update CMake

test/tools/ossfuzz/AbiV2IsabelleFuzzer.cpp

@@ -0,0 +1,37 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <test/tools/ossfuzz/abiV2FuzzerCommon.h>
+
+#include <test/tools/ossfuzz/protoToAbiV2.h>
+
+#include <src/libfuzzer/libfuzzer_macro.h>
+#include <abicoder.hpp>
+
+using namespace solidity::test::abiv2fuzzer;
+using namespace solidity::test;
+using namespace std;
+
+static constexpr size_t abiCoderHeapSize = 1024 * 512;
+
+DEFINE_PROTO_FUZZER(Contract const&)
+{
+	abicoder::ABICoder coder(abiCoderHeapSize);
+	auto [encodeStatus, encodedData] = coder.encode("bool", "true");
+	solAssert(encodeStatus, "Isabelle abicoder fuzzer: Encoding failed");
+	return;
+}