update qt build shell script and update busybox configure file. fix bugs

guowenxue

2019-08-05 7db66f313c397c80a2aa29a1316b241c988194da

 3rdparty/qt/build_QT5.sh

@@ -93,11 +93,14 @@
    cd -
}

cd tslib
  ./build.sh
cd -

cd iconv
if [ ! -f ${LIBS_PATH}/lib/libiconv.so ] ; then
    cd ../iconv
        ./build.sh 
    cd -
fi

cd tslib
  ./build.sh
cd -