add needed busybox features for adktest

package/busybox/Config.in.manual

@@ -42,6 +42,7 @@ config ADK_PACKAGE_BUSYBOX_DEFAULT
 	select BUSYBOX_CUT
 	select BUSYBOX_DD
 	select BUSYBOX_DF
+	select BUSYBOX_DIFF
 	select BUSYBOX_DIRNAME
 	select BUSYBOX_DU
 	select BUSYBOX_ECHO
@@ -60,6 +61,7 @@ config ADK_PACKAGE_BUSYBOX_DEFAULT
 	select BUSYBOX_RM
 	select BUSYBOX_SLEEP
 	select BUSYBOX_SORT
+	select BUSYBOX_FEATURE_SORT_BIG
 	select BUSYBOX_STAT
 	select BUSYBOX_TAIL
 	select BUSYBOX_FEATURE_FANCY_TAIL
@@ -106,6 +108,7 @@ config ADK_PACKAGE_BUSYBOX_MINIMAL
 	select BUSYBOX_DD
 	select BUSYBOX_DF
 	select BUSYBOX_DIRNAME
+	select BUSYBOX_DIFF
 	select BUSYBOX_DU
 	select BUSYBOX_ECHO
 	select BUSYBOX_ENV
@@ -155,6 +158,7 @@ config ADK_PACKAGE_BUSYBOX_ALL
 	select BUSYBOX_CUT
 	select BUSYBOX_DD
 	select BUSYBOX_DF
+	select BUSYBOX_DIFF
 	select BUSYBOX_DIRNAME
 	select BUSYBOX_DU
 	select BUSYBOX_ECHO