development.7: Add example for just kernel modules

[ziaee]

Summary

Reported by: christos
MFC after: 3 days

[christos]

share/man/man7/development.7

155

I think it'd also make sense to mention that this can only work if the module is not build into the kernel.

[ziaee]

Apply christos clarification.

[christos]

I think we're missing the note I suggested: "I think it'd also make sense to mention that this can only work if the module is not built into the kernel."

[ziaee]

s/single kernel module/single loadable kernel module/ to differentiate
from modules in /boot/kernel/kernel.