(Hopefully) fix Info.plist.

Recommended in #2013.

Author: daute

src/Info.plist.in

@@ -80,7 +80,7 @@
     <key>CFBundleName</key>
     <string>${MACOSX_BUNDLE_BUNDLE_NAME}</string>
     <key>CFBundleSignature</key>
-    <string>????</string>
+    <string></string>
     <key>CFBundleVersion</key>
     <string>${MACOSX_BUNDLE_BUNDLE_VERSION}</string>
     <key>CSResourcesFileMapped</key>