add a new MCInstPrinter class, move the (trivial) MCDisassmbler ctor inline.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81745 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCDisassembler.h

@@ -22,7 +22,7 @@ class raw_ostream;
 class MCDisassembler {
 public:
   /// Constructor     - Performs initial setup for the disassembler.
-  MCDisassembler();
+  MCDisassembler() {}
   
   virtual ~MCDisassembler();