<rdar://problem/13941992>

Accept mach-o files with bad segments. Many core files are not created correctly and we should still be able to glean any information we can from them.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@183247 91177308-0d34-0410-b5e6-96231b3b80d8