doc: Update description about example and application table

Author: fanghuaqi

doc/documents/example/example_description.doc

@@ -297,7 +297,7 @@ Please visit \ref EMBARC_APPS "embARC Examples", [<b>embARC Applications</b>](ht
 and \ref EMBARC_APPS_USERGUIDE "Example Usage Guide" for detailed usage information.
 
 \anchor      EMBARC_EXAMPLE_DOCUMENTTABLE
-- **Here is the list of embARC examples**
+- **Here is the list of embARC examples**, located in <embARC>/example.
 |          Example Name          |          Example Directory           |          Example Document Link           |
 |  ---------------------------   |  ----------------------------------  |  --------------------------------------  |
 |  baremetal_arc_feature_axs103   | baremetal/arc_feature/axs103  |   \ref EMBARC_APP_BAREMETAL_ARC_FEATURE_AXS103  |
@@ -344,7 +344,7 @@ and \ref EMBARC_APPS_USERGUIDE "Example Usage Guide" for detailed usage informat
 |  freertos_sec_wolfssl_client   | freertos/sec/wolfssl/client  |   \ref EMBARC_APP_FREERTOS_SEC_WOLFSSL_CLIENT  |
 |  freertos_sec_wolfssl_server   | freertos/sec/wolfssl/server  |   \ref EMBARC_APP_FREERTOS_SEC_WOLFSSL_SERVER  |
 
-- **Here is a list of embARC applications**
+- **Here is a list of embARC applications**, located in <embARC>/application.
 |          Application Name          |          Application Directory           |          Application Document Link           |
 |  ---------------------------   |  ----------------------------------  |  --------------------------------------  |
 |  aws_iot_smarthome_demo   | aws_iot_smarthome/src  |   \ref EMBARC_APP_FREERTOS_IOT_AWS_SMARTHOME_DEMO  |