Next set of additional error checks for invalid Mach-O files for bad load commands

that use the Mach::dyld_info_command type for the load commands that are
currently use in the MachOObjectFile constructor.

This contains the missing checks for LC_DYLD_INFO and
LC_DYLD_INFO_ONLY load commands and the fields for the
Mach::dyld_info_command type.

llvm-svn: 281400