package/bzip2: add hash for license file

Also add a standard sha256 hash for the package itself.

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bzip2/bzip2.hash

@@ -1,2 +1,6 @@
 # From http://www.bzip.org/downloads.html
 md5	00b516f4704d4a7cb50a1d97e6e8e15b	bzip2-1.0.6.tar.gz
+
+# Locally calculated
+sha256	a2848f34fcd5d6cf47def00461fcb528a0484d8edef8208d6d2e2909dc61d9cd	bzip2-1.0.6.tar.gz
+sha256	4919cfb14a73cd64fcef67b107613970cf1659a09aa675dba31314f373bc7204	LICENSE