test/crypto: Update ECC DSA test case

The ECC DSA test case was updated in TinyCrypt 0.2.6.

Fix the length of the random vector.

Change-Id: I7545a51c6855959afdefe00a1e0b53e5c3001a7c
Signed-off-by: Flavio Santes <flavio.santes@intel.com>
1 file changed