shell_and_utilities_recovery: Fix required dependencies

TARGET module shell_and_utilities_recovery requires non-existent: unzip.recovery

This should be referring to the "ziptool" module. "unzip" is a symlink
installed by "ziptool".

Bug: 7456955
Test: TH; boot/ramdisk/system/bin/ziptool installed in /boot partition
Change-Id: Ib9edf9c17b4dfdebdb8719fb7b9244fca6133f6d