[PATCH] Adding simple disassembler.

[Rafael Ávila de Espíndola]

This is fine by me with a nit.

================
Comment at: lib/Target/Hexagon/Disassembler/HexagonDisassembler.cpp:43
@@ +42,3 @@
+      : MCDisassembler(STI, Ctx) {}
+  virtual ~HexagonDisassembler() {}
+
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Why is this needed? MCDisassembler's destructor is virtual, so you should be able to just omit this.

http://reviews.llvm.org/D5829