rtai: add hash file

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rtai/rtai.hash

@@ -0,0 +1,2 @@
+# Locally computed
+sha256 13669da744a0ba411bdb8e47fa47b6e19171646ae42c8dbb2735d12e555fb1a3 rtai-4.0.1.tar.bz2