<rdar://problem/13404009>

Only get the attach_info's user ID if the supplied user info is invalid.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177900 91177308-0d34-0410-b5e6-96231b3b80d8
<rdar://problem/13498504>

 Don't hard code vm page size in profiling code

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177907 91177308-0d34-0410-b5e6-96231b3b80d8