debugger: fix start of remote server

tests/manual/fakevim/runremotely.sh

@@ -10,6 +10,6 @@ qtlibs=`ldd ${executable} | grep libQt | sed -e 's/^.*=> \(.*\) (.*)$/\1/'`
 ssh ${account} "mkdir -p ${targetdir}"
 scp ${executable} ${qtlibs} ${account}:${targetdir}
 ssh ${account} "chrpath -r ${targetdir} ${targetdir}/*"
-ssh ${account} "gdbserver localhost:5555 ${targetdir}/${exename}"
+ssh -X ${account} "gdbserver localhost:5555 ${targetdir}/${exename}"
 ssh ${account} "rm ${targetdir}/* ; rmdir ${targetdir}"