Update unified fstab.manta to support recovery

Add entries to the unified fstab needed by recovery.
Also, copy the unified fstab to /etc/recovery.fstab in the recovery
ramdisk.

Change-Id: I68fab53bed4d901abdf95390cb0ec0db517b5a0e
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 0df8bfd..f7788e0 100755
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -52,6 +52,7 @@
 USE_OPENGL_RENDERER := true
 NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3
 
+TARGET_RECOVERY_FSTAB = device/samsung/manta/fstab.manta
 TARGET_USERIMAGES_USE_EXT4 := true
 BOARD_SYSTEMIMAGE_PARTITION_SIZE := 685768704
 BOARD_USERDATAIMAGE_PARTITION_SIZE := 14273216512