Clark Boylan 5184d02a7c Zerofree the image if possible ...

If the image has an ext filesystem and the zerofree utility is present
on the build system then run zerofree. This should make images as
compressable as possible which is a nice feature when building
compressed qcow2 images.

Change-Id: Ia6062c291f7a3f58b85a4f408ecb3d0574c65d53

2016-03-07 17:45:14 -08:00

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Zerofree the image if possible

2016-03-07 17:45:14 -08:00