rpi-eeprom-config: Trap errors when deleting previous update files

rpi-eeprom-update

@@ -631,6 +631,7 @@ removePreviousUpdates()
    if [ "$(id -u)" = "0" ]; then
       findBootFS
 
+      (
          # Remove any stale recovery.bin files or EEPROM images
          # N.B. recovery.bin is normally ignored by the ROM if is not a valid
          # executable but it's best to not have the file at all.
@@ -639,6 +640,7 @@ removePreviousUpdates()
          rm -f "${BOOTFS}/vl805.bin" "${BOOTFS}/vl805.sig"
          # Case insensitive for FAT bootfs
          find "${BOOTFS}" -maxdepth 1 -type f -follow -iname "recovery.*" -regex '.*\.[0-9][0-9][0-9]$' -exec rm -f {} \;
+      ) || die "Failed to remove previous update files"
    fi
 }