Does Fuse 1.12 supports x86 and x86_64 architectures?

Our build system has support for x86_64, but our default JavaScript engine, the V8 engine, is missing binaries for x86_64. In any case x86 should work, so removing x86_64 from the list should make your build succeed.

"Architectures": {
    "Release": ["armeabi-v7a", "arm64-v8a", "x86"]
}

It might also work to use the JavaScriptCore engine instead because I think JSC provides binaries for all Android ABIs.

"Architectures": {
    "Release": ["armeabi-v7a", "arm64-v8a", "x86", "x86_64"]
},
"Defines": ["USE_JAVASCRIPTCORE"]