[PATCH v2] fit_image: Use calloc() to fix reproducibility issue

[Tom Rini]

On Mon, Jul 27, 2020 at 09:03:13PM -0300, Fabio Estevam wrote:

> Vagrant Cascadian reported that mx6cuboxi target no longer builds
> reproducibility on Debian.
> 
> One example of builds mismatches:
> 
> 00096680: 696e 6700 736f 756e 642d 6461 6900 6465  ing.sound-dai.de
> -00096690: 7465 6374 2d67 7069 6f73 0000            tect-gpios..
> +00096690: 7465 6374 2d67 7069 6f73 0061            tect-gpios.a
> 
> This problem happens because all the buffers in fit_image.c are
> allocated via malloc(), which does not zero out the allocated buffer.
> 
> Using calloc() fixes this unpredictable behaviour as it guarantees
> that the allocated buffer are zero initialized.
> 
> Reported-by: Vagrant Cascadian <vagrant at reproducible-builds.org>
> Suggested-by: Tom Rini <trini at konsulko.com>
> Signed-off-by: Fabio Estevam <festevam at gmail.com>
> Tested-by: Vagrant Cascadian <vagrant at reproducible-builds.org>

Applied to u-boot/master, thanks!

-- 
Tom
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