Install init_rc for recovery modules correctly.

If a module is installed to TARGET_RECOVERY_ROOT_OUT,
then its init rc file (declared in LOCAL_INIT_RC) is installed
to $OUT/recovery/root/system/etc/init instead of
$TARGET(partition)_OUT_ETC/init.

Fixes: 178859897
Test: m snapuserd.recovery

Change-Id: I82d0f40d6d7047e271612204391c5a027f84f52f