Add the start of the support for llvm-objdump’s -private-headers for Mach-O files.

This adds the printing of the mach header. Load command printing will be next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216285 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-objdump/llvm-objdump.cpp

@@ -834,6 +834,8 @@ static void printPrivateFileHeader(const ObjectFile *o) {
     printELFFileHeader(o);
   } else if (o->isCOFF()) {
     printCOFFFileHeader(o);
+  } else if (o->isMachO()) {
+    printMachOFileHeader(o);
   }
 }