[objdump,readobj] Document the purpose and goals of each tool.

llvm-svn: 174439

llvm/tools/llvm-objdump/llvm-objdump.cpp

@@ -11,6 +11,9 @@
 // dumps out a plethora of information about an object file depending on the
 // flags.
 //
+// The flags and output of this program should be near identical to those of
+// binutils objdump.
+//
 //===----------------------------------------------------------------------===//
 
 #include "llvm-objdump.h"