vendor.sh: don't error on main targets

e.g. coreboot/default contains no config directory, so
the old logic would be trying to do:

.

which is obviously invalid

now for example:

$ ./vendor download default
Vendor files not needed for: default

and it will exit with zero status

the only thing that should ever return non-zero status
is when you define a target that does not exist, config
or no.

Signed-off-by: Leah Rowe <leah@libreboot.org>

0 files changed, 0 insertions, 0 deletions