[U-Boot] test/overlay: Fix various malloc/free leaks

[Tom Rini]

On Tue, Sep 26, 2017 at 12:43:12PM -0400, Tom Rini wrote:

> With the overlay tests now being built in sandbox Coverity has found a
> number of issues in the tests.  In short, if malloc ever failed we would
> leak the previous mallocs, so we need to do the usual goto pattern to
> free each in turn.  Finally, we always looked at the free()d location to
> see how many tests had failed for the return code.
> 
> Reported-by: Coverity (CID: 167224, 167227, 167230, 167236)
> Signed-off-by: Tom Rini <trini at konsulko.com>

Applied to u-boot/master, thanks!

-- 
Tom
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