Add the option, -archive-headers, used with -macho to print the Mach-O archive headers to llvm-objdump.

llvm-svn: 226228
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index aff6272..6334859 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -892,7 +892,8 @@
       && !Bind
       && !LazyBind
       && !WeakBind
-      && !(UniversalHeaders && MachOOpt)) {
+      && !(UniversalHeaders && MachOOpt)
+      && !(ArchiveHeaders && MachOOpt)) {
     cl::PrintHelpMessage();
     return 2;
   }