i#1769: suppress Norton reported errors
i#1769: suppress Norton reported errors

Suppresses 3 different types of errors stemming from Norton's injected code:

1) Any uninit callstack with UMEngx86.dll anywhere.
2) A beyond-TOS access from gencode called from kernel* or ntdll.
3) Uninits in a single frame beyond BaseThreadInitThunk, which
   targets Norton's injected thread.

Fixes #1769

Review-URL: https://codereview.appspot.com/262490043

code4bones/drmemory,code4bones/drmemory,code4bones/drmemory,code4bones/drmemory,code4bones/drmemory