ell: update to version 0.76

ell: update to version 0.76

ver 0.76:
    Fix issue with random scalar generation.

ver 0.75:
    Add support for converting OID octets to strings.
    Add support for NIST P-224 cuve usage with ECDH.
    Add support for NIST P-521 cuve usage with ECDH.
    Add support for SHA-3 series of hashing algorithms.

ver 0.74:
    Add support for NIST P-192 curve usage with ECDH.
    Add support for SHA-224 based checksums and HMACs.

ver 0.73:
    Fix issue with parsing hwdb.bin child structures.

ver 0.72:
    Add support for the Test Anything Protocol.

Signed-off-by: Daniel Golle <[email protected]>