busybox: add whoami for PS1 as default

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

package/busybox/Config.in.manual

@@ -78,6 +78,8 @@ config ADK_PACKAGE_BUSYBOX_DEFAULT
 	select BUSYBOX_TEE
 	select BUSYBOX_UNAME
 	select BUSYBOX_WC
+	select BUSYBOX_WHOAMI
+	select BUSYBOX_WHO
 	select BUSYBOX_MKTEMP
 	select BUSYBOX_WHICH
 	select BUSYBOX_VI
@@ -168,6 +170,7 @@ config ADK_PACKAGE_BUSYBOX_ALL
 	select BUSYBOX_TOUCH
 	select BUSYBOX_TR
 	select BUSYBOX_WHO
+	select BUSYBOX_WHOAMI
 	select BUSYBOX_CAL
 	select BUSYBOX_CHGRP
 	select BUSYBOX_CHMOD