Modeled after modules/tpmtotp, use a specific git commit hash for
module libremkey-hotp-verification. Add hidapi as a submodule with
dummy/placeholder in modules (like coreboot-blobs), also specified
by git commit hash. Adjust libremkey-hotp-verification patch file
name so patch applied properly.
Addresses issue #640
Test: build Librem 13v4
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
