Don't use a "uintptr_t" for the metadata key, use a "void *".  This removes all of the casts that were being used and cleans the code up a bit. Also added the ability to dump the metadata.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@178113 91177308-0d34-0410-b5e6-96231b3b80d8