Fill in "Target Platforms" column for Qt Remote Objects

Change-Id: I117aa2799cf9931cd32688decb729925a89647ae
Reviewed-by: Brett Stottlemyer <bstottle@ford.com>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

doc/src/qtmodules.qdoc

@@ -264,7 +264,7 @@
     \row
         \li \l{Qt Remote Objects}
         \li All
-        \li
+        \li All
         \li Provides an easy to use mechanism for sharing a QObject's API
              (Properties/Signals/Slots) between processes or devices.
     \row