A few more tweaks to the python perf tests. Now there is a MemoryMeasurement.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@178069 91177308-0d34-0410-b5e6-96231b3b80d8
Trim the output build folder a bit to it isn't so large.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@178070 91177308-0d34-0410-b5e6-96231b3b80d8