Add QT 4.6.4 build shell script and apps build shell script in qt4 folder

guowenxue

2019-05-17 1abf6c4b401af1c20d62fe9c2f5e73ce84d14b22

 mqttd/main.c

@@ -60,7 +60,7 @@
        }
        else
        {
            printf("SHT2X Temperature=%lf ℃ relative humidity=%lf%\n", temp, rh);
            printf("SHT2X Temperature=%lfC, Relative humidity=%lf%% \n", temp, rh);
        }