sparkle: use https to check update feed

OSX is enforcing the use of https over http. Since we now have a
valid SSl cert for our gpl server we can switch over https.

Bump Sparkle: a lot of security breaches have been patched.

Change-Id: Iaeab3357ef5aee01494e1d0df3b968c6580196b5
Tuleap: #565

cmake/MacOSXBundleInfo.plist.in

@@ -15,7 +15,7 @@
     <key>SUPublicDSAKeyFile</key>
     <string>dsa_pub.pem</string>
     <key>SUFeedURL</key>
-    <string>http://gpl.savoirfairelinux.net/ring-download/mac_osx/sparkle-ring.xml</string>
+    <string>https://gpl.savoirfairelinux.net/ring-download/mac_osx/sparkle-ring.xml</string>
     <key>CFBundleInfoDictionaryVersion</key>
     <string>6.0</string>
     <key>CFBundleLongVersionString</key>

Sparkle @ 7fdedad6

-Subproject commit 4e332850686b2ac9f581a4779af4d4b442fdd5be
+Subproject commit 7fdedad68e95dce929f93678697bdbd905c7d33e