Add MD5 checksums for 7.7 release

docs/relnotes-7.7.html

@@ -28,7 +28,15 @@ for DRI hardware acceleration.
 
 <h2>MD5 checksums</h2>
 <pre>
-tbd
+395c9516edf1ad54b0934d8db15557bf  MesaLib-7.7.tar.gz
+e3fa64a1508bc23dd9de9dd2cea7cfb1  MesaLib-7.7.tar.bz2
+e54903eb5e49c3969821fa16b32da245  MesaLib-7.7.zip
+53b5b6f78e55de170d43c98cb6aaab7e  MesaDemos-7.7.tar.gz
+6fd616b27b9826d0faa23e08e05d9435  MesaDemos-7.7.tar.bz2
+240fe06159ad73d5e22c27033b66c80a  MesaDemos-7.7.zip
+9fe11a904b2a9d8cd06cc52bc330b716  MesaGLUT-7.7.tar.gz
+e8dceed05a59a2d3c2619d7d734587e3  MesaGLUT-7.7.tar.bz2
+96af041d435349ee23ead4667ec36363  MesaGLUT-7.7.zip
 </pre>