Move the performance test cases into their own project.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177341 91177308-0d34-0410-b5e6-96231b3b80d8
Add a comment about how to add a target for a test case.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177343 91177308-0d34-0410-b5e6-96231b3b80d8
Fixed the README to match the current code.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177346 91177308-0d34-0410-b5e6-96231b3b80d8