Increase minimum RAM requirement for installation to 96MB.
On 9.3 & 10.3 (both amd64 builds) whilst the kernel boots & installer runs with
such an amount, the installer fails when attempting to extract a set.
On 11 it's not actually possible to boot the kernel with less than 96MB (amd64)
or 92MB (i386).
Tested using VirtualBox not actual hardware.
PR: 211280
Obtained from: bcr (mentor)
Differential Revision: https://reviews.freebsd.org/D8112