Add printing the LC_SUB_UMBRELLA load command with llvm-objdump’s -private-headers.

llvm-svn: 224548
diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index a5031f1..fd086af 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -2314,6 +2314,11 @@
   return getStruct<MachO::sub_framework_command>(this, L.Ptr);
 }
 
+MachO::sub_umbrella_command
+MachOObjectFile::getSubUmbrellaCommand(const LoadCommandInfo &L) const {
+  return getStruct<MachO::sub_umbrella_command>(this, L.Ptr);
+}
+
 MachO::any_relocation_info
 MachOObjectFile::getRelocation(DataRefImpl Rel) const {
   DataRefImpl Sec;