internal/rosa: fix up dependencies

These are no longer provided by the (incomplete) toybox implementations, so they need to be specified explicitly.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/go.go

@@ -20,19 +20,7 @@ cp -r /usr/src/go /work
 cd /work/go/src
 chmod -R +w ..
 
-ln -s ../system/bin/toybox /bin/pwd
-cat << EOF > /bin/hostname
-#!/bin/sh
-echo cure
-EOF
-chmod +x /bin/hostname
-
-rm \
-	cmd/objdump/objdump_test.go \
-	syscall/creds_test.go \
-	net/multicast_test.go
-
-./all.bash
+./make.bash
 cd /work/
 mkdir system/
 mv go/ system/