message: ci: fix Python stdout buffering
diff: @@ -20,6 +20,7 @@ stages:
  variables:
  GIT_SUBMODULE_STRATEGY: recursive
  OIDN_ROOT_DIR: "$CI_PROJECT_DIR"
  + PYTHONUNBUFFERED: 1
  .build-linux:
  stage: build
  @@ -83,6 +84,7 @@ build-ubuntu18.04-clang:
  variables:
  GIT_SUBMODULE_STRATEGY: recursive
  OIDN_ROOT_DIR: "$CI_PROJECT_DIR"
  + PYTHONUNBUFFERED: 1
  .build-macos:
  stage: build
  @@ -125,6 +127,7 @@ package-macos:
  variables:
  GIT_SUBMODULE_STRATEGY: recursive
  OIDN_ROOT_DIR: "$CI_PROJECT_DIR"
  + PYTHONUNBUFFERED: 1
  ErrorActionPreference: stop
  .build-windows:
  