This commit updates the nwipe package to build from a specific Git commit
instead of using the previously referenced tarball release. The changes
include:
- Setting NWIPE_SITE to the GitHub repository and NWIPE_SITE_METHOD to git.
- Specifying the commit hash (051e1aa) in NWIPE_VERSION.
- Removing or emptying the nwipe.hash file, as we no longer verify a tarball
and instead rely on the Git checkout.
This approach allows ShredOS/Buildroot to clone the nwipe repository at
commit 051e1aa, apply the banner patch, and build the nwipe binary directly
from Git.
