The sample program (socket-api) does not work

[khorii1113]

I have found two issues with the sample program (socket-api)

1. An error occurs at pthread_create() in samples/socket-api/wasm-src/send_recv.c when using WASI-SDK version 26 or later.
2. There is a bug in the testing tool (sample_test_run.py).

I have confirmed that applying the patch below resolves these issues.
However, is there a more appropriate way to address issue (1)?

diff.patch