Commands in OSSFuzz README for building the fuzzer are incomplete

[haoyang9804]

Check the following command in OSSFuzz's readme:

## Docker shell
$ cd /src/solidity
$ rm -rf fuzzer-build && mkdir fuzzer-build && cd fuzzer-build
## Compile protobuf C++ bindings
$ protoc --proto_path=../test/tools/ossfuzz yulProto.proto --cpp_out=../test/tools/ossfuzz
$ protoc --proto_path=../test/tools/ossfuzz abiV2Proto.proto --cpp_out=../test/tools/ossfuzz
## Run cmake
$ export CC=clang CXX=clang++
$ cmake -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/libfuzzer.cmake -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-Release} ..
$ make ossfuzz ossfuzz_proto ossfuzz_abiv2 -j

There should be another protoc command for generating solProto.pb.cc and solProto.pb.h, otherwise the subsequent cmake will fail.
This is the correct command set:

## Docker shell
$ cd /src/solidity
$ rm -rf fuzzer-build && mkdir fuzzer-build && cd fuzzer-build
## Compile protobuf C++ bindings
$ protoc --proto_path=../test/tools/ossfuzz yulProto.proto --cpp_out=../test/tools/ossfuzz
$ protoc --proto_path=../test/tools/ossfuzz abiV2Proto.proto --cpp_out=../test/tools/ossfuzz
$ protoc --proto_path=../test/tools/ossfuzz solProto.proto --cpp_out=../test/tools/ossfuzz
## Run cmake
$ export CC=clang CXX=clang++
$ cmake -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/libfuzzer.cmake -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-Release} ..
$ make ossfuzz ossfuzz_proto ossfuzz_abiv2 -j

[bshastry]

Thanks for pointing out! You are right. Would you be interested in contributing the solution in the post above as a PR? I would be happy to review and help get it merged 🙏

[haoyang9804]

Thanks for pointing out! You are right. Would you be interested in contributing the solution in the post above as a PR? I would be happy to review and help get it merged 🙏

No problem. I'll submit a pr in the next few days.

[haoyang9804]

I have posted a PR here: #15119