add missing file to .cabal file

mzero · mzero · commit 84a1e321763a · 2015-08-01T10:38:52.000-07:00
so it will get bundled in the source tarball
diff --git a/hptool/hptool.cabal b/hptool/hptool.cabal
@@ -35,6 +35,7 @@ Executable hptool
     Releases2012,
     Releases2013,
     Releases2014,
+    Releases2015,
     SourceTarball,
     Target,
     Templates,
