oeqa/concurrencytest: Ensure subunit streams are flushed at exit

Without this, error output such as that in the teardown can be lost
and processes may recieve signals they're not expecting causing other
strange errors.

(From OE-Core rev: 1e3f44737a15feb3128ba7fc0dbe896dd8782e07)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/lib/oeqa/core/utils/concurrencytest.py b/meta/lib/oeqa/core/utils/concurrencytest.py
index 850586516a..6404cb4668 100644
--- a/meta/lib/oeqa/core/utils/concurrencytest.py
+++ b/meta/lib/oeqa/core/utils/concurrencytest.py
@@ -225,7 +225,9 @@ def fork_for_tests(concurrency_num, suite):
                 finally:
                     if newbuilddir:
                         removebuilddir(newbuilddir)
+                    stream.flush()
                     os._exit(1)
+            stream.flush()
             os._exit(0)
         else:
             os.close(c2pwrite)