message: Rearrange #include directives to pass to compilation with a particular DSP toolchain
  iomanip isn't available for our DSP. Luckily, we compile with FLATBUFFERS_PREFER_PRINTF, so moved the #include directive there.
  ctype.h has to be included explicilty for tolower() and toupper().
diff: #define FLATBUFFERS_UTIL_H_
  #include <errno.h>
  +#include <ctype.h>
  #include "flatbuffers/base.h"
  #include "flatbuffers/stl_emulation.h"
  #ifndef FLATBUFFERS_PREFER_PRINTF
  # include <sstream>
  +# include <iomanip>
  #else // FLATBUFFERS_PREFER_PRINTF
  # include <float.h>
  # include <stdio.h>
  #endif // FLATBUFFERS_PREFER_PRINTF
  -#include <iomanip>
  #include <string>
  namespace flatbuffers {
  