stage2: replace dphys-swapfile with rpi-swap

stage2/01-sys-tweaks/00-packages

@@ -14,7 +14,7 @@ luajit
 ca-certificates curl
 nfs-common usbutils
 dosfstools
-dphys-swapfile
+rpi-swap rpi-loop-utils
 raspberrypi-sys-mods
 pi-bluetooth
 apt-listchanges

stage2/01-sys-tweaks/00-patches/02-swap.diff

@@ -1,13 +0,0 @@
-Index: jessie-stage2/rootfs/etc/dphys-swapfile
-===================================================================
---- jessie-stage2.orig/rootfs/etc/dphys-swapfile
-+++ jessie-stage2/rootfs/etc/dphys-swapfile
-@@ -13,7 +13,7 @@
- 
- # set size to absolute value, leaving empty (default) then uses computed value
- #   you most likely don't want this, unless you have an special disk situation
--#CONF_SWAPSIZE=
-+CONF_SWAPSIZE=512
- 
- # set size to computed value, this times RAM size, dynamically adapts,
- #   guarantees that there is enough swap without wasting disk space on excess

stage2/01-sys-tweaks/00-patches/series

@@ -1,4 +1,3 @@
 01-useradd.diff
-02-swap.diff
 04-inputrc.diff
 05-path.diff