The record buffer is were we store the light indices, its maximum
size is 65536 entries, but is often limited to 16384 on about 30%
of Android devices because of the 16KB UBO limit.
This PR makes the record buffer use up to 64K entries when allowed
but the h/w.
The record buffer can be a limiting factor when many lights are used
with many froxels. With the minimum of 4096 froxels and a 16KB record
buffer we get an average of 4 lights per froxel. With our maximum of
8192 froxels and a 64KB record buffer we get 8 lights in average per
froxel.
88fa99d782