busybox: enable strings applet

Author: gtxaspec

package/busybox/busybox.config

@@ -839,7 +839,7 @@ CONFIG_RX=y
 CONFIG_SEEDRNG=y
 # CONFIG_SETFATTR is not set
 CONFIG_SETSERIAL=y
-# CONFIG_STRINGS is not set
+CONFIG_STRINGS=y
 CONFIG_TIME=y
 CONFIG_TREE=y
 CONFIG_TS=y