bzip2: add hash file

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bzip2/bzip2.hash

@@ -0,0 +1,2 @@
+# From http://www.bzip.org/downloads.html
+md5	00b516f4704d4a7cb50a1d97e6e8e15b	bzip2-1.0.6.tar.gz