option.sh: fix bad check for version/versiondate

i was checking whether it's a directory, whereas i should
have been checking whether it's a file. this is a workaround
put in place in case someone downloaded a tarball from codeberg
which is pre-generated per commit. in this situation, the
version and versiondate files do not exist, but the design
of the build system requires that they do exist.

the existing check is correct except for this bug, so fix
the bug. check that they are files, not directories

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

0 files changed, 0 insertions, 0 deletions