Get Trust Wallet Core to build like other libraries

[SuperGNUS]

We need trust wallet core to build on all platforms. We'll then make calls into it from Flutter/Dart through FFI code from the Genius Wallet.

[SuperGNUS]

Please add this to our build/CommonTargets as an external project and get it to build on Linux, OSX, Windows, Android and iOS as part of the thirdparty library collection.

[SuperGNUS]

Suyuti. This probably needs a custom External_Project() Configure/install command(s).

Should use the VC and Linux way of using our thirdparty libraries for find_package(boost), find_package(grpc), etc.

Also, make sure that it compiles with Windows, Linux, OSX, Android & iOS Cmake systems.

[henriqueaklein]

Pending verification of OSX, iOS and make it work for Windows

[henriqueaklein]

Finished making it work for Windows, although visibility of symbols is an issue yet.

[henriqueaklein]

Fixed visibility issue on Windows, but there might be some changes down the road, since not all functions might be needed