Merge "Revert "unpack_bootimg: Create symlink as alternate vendor ramdisk names"" am: c69cc6d39b am: ccb2da3275 am: a88c100f85

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/1669628

Change-Id: I9918b48518139de59cb77413cf8715152db5800a