Fix the syntax in install-recovery.sh

We recently modify the logic in install-recovery.sh to support
non-A/B updates on VAB launched devices. And the position of the
$(getprop ro.boot.slot_suffix) is misplaced for the recovery image.
For example:
"if ! applypatch --check EMMC$(getprop ro.boot.slot_suffix):/dev/block/recovery:SHA1"
should be:
"if ! applypatch --check EMMC:/dev/block/recovery$(getprop ro.boot.slot_suffix):SHA1"

Bug: 156979431
Test: rerun add_image_to_target_file, then validate_target_files
Change-Id: Id2d45e281151a46d66b37ea8fdb7b5cb4ae72e81
(cherry picked from commit e55f62c9)