[MetaSchedule] Enable subprocess to stdout for DEBUG level

[cbalint13]

Hi folks,

Small enhancement for catching error messages from local runners.

---

As needed by #15522, it ease to spot, pin & debug things:

• Rise the logging level:

import logging
logging.basicConfig(level=logging.DEBUG)
{...}

• Captured message from runners:

2023-08-11 14:05:48 [INFO] [task_scheduler.cc:193] Sending 8 sample(s) to builder
2023-08-11 14:05:51 [INFO] [task_scheduler.cc:195] Sending 8 sample(s) to runner
/usr/bin/python3: symbol lookup error: /tmp/tmpqc99dte5/tvm_tmp_mod.tar.so: undefined symbol: VEC_MACC
/usr/bin/python3: symbol lookup error: /tmp/tmpqc99dte5/tvm_tmp_mod.tar.so: undefined symbol: VEC_MACC
{...}

Thanks,
~Cristian.

[tvm-bot]

Thanks for contributing to TVM! Please refer to the contributing guidelines https://tvm.apache.org/docs/contribute/ for useful information and tips. Please request code reviews from Reviewers by @-ing them in a comment.

• cc @ibsidorenko _{See #10317 for details}

_{Generated by tvm-bot}

[quic-sanirudh]

LGTM, thanks.