Rollup merge of rust-lang#30781 - dhuseby:add_dragonflybsd_snapshot_3391630, r=alexcrichton

@alexcrichton please upload the following snapshots:

https://github.com/dhuseby/rust-manual-snapshots/raw/master/rust-stage0-2015-12-18-3391630-dragonfly-x86_64-e74d79488e88ac2de3bd03afd5959d2ae6e2b628.tar.bz2

thanks!

Author: Manishearth

src/snapshots.txt

@@ -2,6 +2,7 @@ S 2015-12-18 3391630
   bitrig-x86_64 6476e1562df02389b55553b4c88b1f4fd121cd40
   freebsd-i386 7e624c50494402e1feb14c743d659fbd71b448f5
   freebsd-x86_64 91724d4e655807a2a2e940ac50992ebeaac16ea9
+  dragonfly-x86_64 e74d79488e88ac2de3bd03afd5959d2ae6e2b628
   linux-i386 a09c4a4036151d0cb28e265101669731600e01f2
   linux-x86_64 97e2a5eb8904962df8596e95d6e5d9b574d73bf4
   macos-i386 ca52d2d3ba6497ed007705ee3401cf7efc136ca1