overlapping partitions issue with resize of 8GB image put on 16GB sd card

[xalius]

I managed to resize the /data partition on the old style Android images a while back, but it's not a straightforward thing to do. I ended up using sfdisk and a desk calculator since normal tools will refuse to work and/or calculate the start of the new partition wrong for some reason. The large partition entry at the beginning of the list has actually sane boundaries and starts where the extended partition containing all the other partitions ends, but most tools dont like the primary partitions sitting inside an extended partition and refuse to work on that....