Add recovery.wipe file.

Bug: 36427762
Test: lunch muskie-userdebug && make bootimage. Check
      $OUT/recovery/root/etc/recovery.wipe exists.
Change-Id: Id86c53d62d2b5a293f22b37fef3c64caa82f15f1

BoardConfig.mk

@@ -47,6 +47,9 @@ TARGET_RECOVERY_FSTAB := device/google/wahoo/fstab.hardware
 BOARD_USES_RECOVERY_AS_BOOT := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
 
+# Partitions (listed in the file) to be wiped under recovery.
+TARGET_RECOVERY_WIPE := device/google/wahoo/recovery.wipe
+
 ENABLE_CPUSETS := true
 
 TARGET_COPY_OUT_VENDOR := vendor

recovery.wipe

@@ -0,0 +1,10 @@
+# All the partitions to be wiped (in order) under recovery.
+/dev/block/bootdevice/by-name/system_a
+/dev/block/bootdevice/by-name/system_b
+/dev/block/bootdevice/by-name/vendor_a
+/dev/block/bootdevice/by-name/vendor_b
+/dev/block/bootdevice/by-name/userdata
+# Wipe the boot partitions last so that all partitions will be wiped
+# correctly even if the wiping process gets interrupted by a force boot.
+/dev/block/bootdevice/by-name/boot_a
+/dev/block/bootdevice/by-name/boot_b