Ignore templated aggregates in the Objective-C
runtime.  This eliminates potential confusion
when the compiler has to deal with these weird
types later on.

One day I'd like to actually generate the proper
templates, but this is not the day that I write
the parser code to do that.

<rdar://problem/18887634>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@221658 91177308-0d34-0410-b5e6-96231b3b80d8