We use subprocess.check_output() to run the command, which means that we need care
about the error, so the 2>/dev/null should not be used, otherwise it is hard to
debug when the error happens.
I guess it was copied from previous lines, but that command's error can be
ignored (excpet: pass):
try:
subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
except subprocess.CalledProcessError:
# Can "fail" if internal headers/transient sources are attempted
pass
But we don't do this in the current location, so remove "2>/dev/null"
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>