WiFi GLDv3 test4 from /ws/onnv-stc2-clone/src/suites/gldv3/wifi/common-cmd/show-link
executes the following command:
'dladm show-link wpi0 -s -i 5 > /tmp/show-link.tmp 2>&1 &'
and waits for 100s after which it is
expecting to find /tmp/show-link.tmp with non-zero bytes
but the redirected output is only flushed after the internal
buffers are filled.
CR 6740062 removed the redundant printing of headers after each line of output.
So the buffer does not get filled up in 100s, subsequently no
file is found, and the test fails.