ble_mesh: Move TAG definition to each example

Move the TAG definition of each example to the corresponding
source file (previously it is defined in the common example
intialization header file), which can avoid the redefinition
of TAG in some situations.

examples/bluetooth/esp_ble_mesh/common_components/example_init/ble_mesh_example_init.c

@@ -26,7 +26,8 @@
 #endif
 
 #include "esp_ble_mesh_defs.h"
-#include "ble_mesh_example_init.h"
+
+#define TAG "EXAMPLE_INIT"
 
 #ifdef CONFIG_BT_BLUEDROID_ENABLED
 void ble_mesh_get_dev_uuid(uint8_t *dev_uuid)

examples/bluetooth/esp_ble_mesh/common_components/example_init/ble_mesh_example_init.h

@@ -11,8 +11,6 @@
 
 #include "esp_err.h"
 
-#define TAG "EXAMPLE"
-
 void ble_mesh_get_dev_uuid(uint8_t *dev_uuid);
 
 esp_err_t bluetooth_init(void);