Two fixes in the Objective-C language runtime:

- First, when logging, be helpful by printing
  the real name of the class;

- Second, up the limit for number of classes
  from 16k to 128k, and put in an assertion
  (and better error handling when not in a
  debug configuration) when we cross that
  limit the next time.

<rdar://problem/17052976>

llvm-svn: 213218