'make distribution' must be run from src, not src/etc, so that the proper set of /usr/share/mk/* is available. This is necessary to build a 7.x NanoBSD image on a 6.x host.
'make distribution' must be run from src, not src/etc, so that the proper
set of /usr/share/mk/* is available. This is necessary to build a 7.x
NanoBSD image on a 6.x host.

Reviewed by:	phk

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase