[llvm-objdump] Add -x --all-headers options

Reviewers: paulsemel, echristo

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D48622

llvm-svn: 335785
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.h b/llvm/tools/llvm-objdump/llvm-objdump.h
index a4df1d9..e8cc83e 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.h
+++ b/llvm/tools/llvm-objdump/llvm-objdump.h
@@ -32,6 +32,7 @@
 extern cl::opt<std::string> MCPU;
 extern cl::list<std::string> MAttrs;
 extern cl::list<std::string> FilterSections;
+extern cl::opt<bool> AllHeaders;
 extern cl::opt<bool> Disassemble;
 extern cl::opt<bool> DisassembleAll;
 extern cl::opt<bool> NoShowRawInsn;