Add the ability to tag one or more breakpoints with a name.  These
names can then be used in place of breakpoint id's or breakpoint id 
ranges in all the commands that operate on breakpoints.

<rdar://problem/10103959>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@224392 91177308-0d34-0410-b5e6-96231b3b80d8