rootdir: include /etc/recovery.fstab in recovery

A few commits before had moved /etc/recovery.fstab to /etc/fstab,
saying that missing /etc/fstab makes /cache not mounted automatically
in case there isn't any update on /cache.

However, missing /etc/recovery.fstab cause the recovery's updater to be
unable to find the update reside in /cache on boot. Beside, this file
is needed by system-image-upgrader to determine what partitions are
available on the system. Missing this file cause system-image-upgrader
to be unable to flash raw partitions.

The solution is to include both files in recovery image. As both files
are actually the same content, I simply tell the build system to copy
the same file twice.

Change-Id: Id780fafd072db67e6e5b8d0debd2bc2681772d69

FP2.mk

@@ -116,6 +116,7 @@ PRODUCT_COPY_FILES += \
     device/fairphone/FP2/rootdir/root/init_bt.sh:root/init_bt.sh \
     device/fairphone/FP2/rootdir/root/init.wcnss.wifi.sh:root/init.wcnss.wifi.sh \
     device/fairphone/FP2/rootdir/root/fstab.qcom:root/fstab.qcom \
+    device/fairphone/FP2/rootdir/root/recovery.fstab:recovery/root/etc/recovery.fstab \
     device/fairphone/FP2/rootdir/root/recovery.fstab:recovery/root/etc/fstab \
     device/fairphone/FP2/rootdir/root/twrp.fstab:root/twrp.fstab \
     device/fairphone/FP2/rootdir/root/init.qcom.rc:root/init.qcom.rc \