mwan3: add IPKG_INSTROOT to scripts

IPKG_INSTROOT needed for including mwan3 when building images

Signed-off-by: Aaron Goodman <aaronjg@stanford.edu>

net/mwan3/files/etc/init.d/mwan3

@@ -1,9 +1,8 @@
 #!/bin/sh /etc/rc.common
 
-. /lib/functions.sh
-. /lib/mwan3/common.sh
-. /lib/functions/network.sh
-. /lib/mwan3/mwan3.sh
+. "${IPKG_INSTROOT}/lib/mwan3/common.sh"
+. "${IPKG_INSTROOT}/lib/functions/network.sh"
+. "${IPKG_INSTROOT}/lib/mwan3/mwan3.sh"
 
 START=19
 USE_PROCD=1

net/mwan3/files/lib/mwan3/mwan3.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-. /usr/share/libubox/jshn.sh
+. "${IPKG_INSTROOT}/usr/share/libubox/jshn.sh"
 
 IPS="ipset"
 IPT4="iptables -t mangle -w"