dev: provide better error message on `make` missing before `run`

The `./dev/run` script requires a boot script to be compiled
which assumes a completed build of the source tree.  If this did
not happen, the script fails to work and CouchDB cannot be started
up.

The failure of the boot script's compilation by itself does not
necessarily help to understand the reason, so enhance it with a
suggestion for the user.
1 file changed