Make the early boot process boot-location-agnostic

Instead of using fixed block device names for /system and /data, let
fsfinder set up links for us based on the boot location.  This allows us
to run unmodified from both eMMC and external SD card.

encore.mk

@@ -29,6 +29,8 @@ PRODUCT_COPY_FILES += \
     device/bn/encore/ueventd.encore.rc:root/ueventd.encore.rc \
     device/bn/encore/fstab.encore:root/fstab.encore
 
+PRODUCT_PACKAGES += fsfinder
+
 # key mapping and touchscreen files
 PRODUCT_COPY_FILES += \
     device/bn/encore/prebuilt/usr/idc/cyttsp-i2c.idc:/system/usr/idc/cyttsp-i2c.idc \

fstab.encore

@@ -3,11 +3,11 @@
 # The filesystem that contains the filesystem checker binary (typically /system) cannot 
 # specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK 
 ######################
-/dev/block/mmcblk0p5	/system	ext4	ro,barrier=1	wait
-/dev/block/mmcblk0p6	/data	ext4	noatime,nosuid,nodev,barrier=1,noauto_da_alloc	wait,check
+/dev/block/by-name/system	/system	ext4	ro,barrier=1	wait
+/dev/block/by-name/userdata	/data	ext4	noatime,nosuid,nodev,barrier=1,noauto_da_alloc	wait,check
 /dev/block/mmcblk0p7	/cache	ext4	noatime,nosuid,nodev,barrier=1	wait,check
 /dev/block/mmcblk0p2	/rom	vfat	sync,noatime,nodiratime,uid=1000,gid=1000,fmask=117,dmask=007	defaults
-/dev/block/mmcblk0p1	/boot	vfat	fmask=177,dmask=077	recoveryonly
+/dev/block/by-name/boot	/boot	vfat	fmask=177,dmask=077	recoveryonly
 
 # Swap devices
 /dev/block/zram0	none	swap	defaults	zramsize=100663296

init.encore.rc

@@ -44,6 +44,11 @@ on init
     write /proc/sys/vm/swappiness 20
 
 on fs
+    # set up links to block devices based on boot location
+    mkdir /dev/block/by-name 0755 root root
+    start fsfinder
+    wait /dev/block/by-name/system
+
     # mount partitions
     mount_all /fstab.encore
     swapon_all /fstab.encore
@@ -211,6 +216,11 @@ on property:dev.bootcomplete=1
     write /sys/kernel/mm/ksm/sleep_millisecs 500
     write /sys/kernel/mm/ksm/run 1
 
+service fsfinder /sbin/fsfinder
+    class core
+    disabled
+    oneshot
+
 #service mountd /system/bin/mountd
 #   socket mountd stream 0660 root mount