Adding a swap partition to the March 5 snapshot image

[bob prohaska]

I've been trying for a while to set up an armv7 RPI2 with a single
root partition plus a swap partition at the end of mmcsd0. Letting
firstboot invoke growfs seems not to help, since growfs leaves no
space for swap.

Attempts using gpart in single-user give the appearance of 
working, but on reboot the machine stops at the mountroot prompt.
This method worked well in July of 2018. Seemingly, no more. 

Has something changed? 

Mounting the armv7 card on a second Freebsd box and making the changes 
appears to work also, but on the initial boot (firstboot disabled) the 
machine stops at the mountroot prompt on initial boot.

If there's a better way to pursue the same end I'd be grateful for
a hint. Perhaps giving a swap size  parameter to firstboot? 

Thanks for reading,

bob prohaska