package/mbuffer: add hash for license file

Add hash for license file and update indentation (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/mbuffer/mbuffer.hash

@@ -1,5 +1,8 @@
 # From http://www.maier-komor.de/mbuffer.html
-md5 e4acaa1e6a9a879e7394f04e02e1ae83  mbuffer-20191016.tgz
+md5  e4acaa1e6a9a879e7394f04e02e1ae83  mbuffer-20191016.tgz
 
 # Locally computed after checking signature upstream
-sha256 8dc210454765c18901074bc16e126c655135a486e73d69855caf74a157ddbe17  mbuffer-20191016.tgz
+sha256  8dc210454765c18901074bc16e126c655135a486e73d69855caf74a157ddbe17  mbuffer-20191016.tgz
+
+# Hash for license file
+sha256  8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  LICENSE