oeqa: fix warnings for append operators combined with +=
Signed-off-by:Yi Zhao <yi.zhao@windriver.com> Signed-off-by:
Richard Purdie <richard.purdie@linuxfoundation.org>
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Signed-off-by:Yi Zhao <yi.zhao@windriver.com> Signed-off-by:
Richard Purdie <richard.purdie@linuxfoundation.org>