Use pngcrush -brute by default.

But fallback to optipng -o7 and then pngout.

This saves ~2M in final .zip size at a cost of ~5 min of build time on
my laptop.

Change-Id: Ic56f677bdc8250f4088f4dbfbfd555ceed5616c2
Signed-off-by: Evan McClain <aeroevan@gmail.com>
1 file changed