capstone: compile-time version check

This version check could (and probably should) also be done in the cmake
scripts.  However, this check in CapstoneDisassembler.cpp catches another
failure mode: When a cmake script is missing a include_directories()
directive pointing to capstone.h -- resulting in a missing -I parameter to
gcc -- accidentally a system-wide 3.x capstone.h may get #included,
providing the wrong definitions and prototypes to some translation units.

Change-Id: Id30f77a47e38f4e892b92189bcce9119bf03918c

src/core/util/capstonedisassembler/CapstoneDisassembler.cpp

@@ -1,3 +1,8 @@
+#include <capstone/capstone.h>
+#if CS_MAKE_VERSION(CS_API_MAJOR, CS_API_MINOR) < CS_MAKE_VERSION(4, 0)
+#  error Need libcapstone >= 4.0
+#endif
+
 #include "CapstoneDisassembler.hpp"
 
 using namespace fail;

src/core/util/capstonedisassembler/CapstoneDisassembler.hpp

@@ -14,7 +14,6 @@
 #include "CapstoneToFailBochs.hpp"
 #include "CapstoneToFailGem5.hpp"
 
-#include <capstone/capstone.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <libelf.h>