update: 补充log_br值,实现自动修改波特率

soc_tools/AIR101.json

@@ -36,7 +36,8 @@
     },
     "user" : {
         "project" : "",
-        "version" : ""
+        "version" : "",
+        "log_br" : "921600"
     },
 	"download" : {
 		"core_addr" : "0x00000000",

soc_tools/AIR103.json

@@ -36,7 +36,8 @@
     },
     "user" : {
         "project" : "",
-        "version" : ""
+        "version" : "",
+        "log_br" : "921600"
     },
 	"download" : {
 		"core_addr" : "0x00000000",