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

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

Change-Id: I37c2bb40f8459b7c305a3dbfcbd40efe48066aa2