Update readelf to know about the new ELF constants

[Nick Clifton]

Hi Uli,  Hi H.J.,

  Thanks to everyone who pointed out that I had missed the presence
of alternate machine numbers in the bfd backends.  So Uli, H.J. how
about adding these numbers to the official list ?

  #define EM_AVR        11   /* Atmel AVR 8-bit microcontroller.  */
  #define EM_FR30       12   /* Fujitsu FR30.  */
  #define EM_D10V       13   /* Mitsubishi D10V.  */
  #define EM_D30V       14   /* Mitsubishi D30V.  */
  #define EM_ALPHA      16   /* DEC Alpha.  */
  #define EM_V850       22   /* NEC v850.  */
  #define EM_ARC        23   /* ARC Cores.  */
  #define EM_M32R       24   /* Mitsubishi M32R.  */
  #define EM_MN10300    25   /* Matsushita MN10300.  */
  #define EM_MN10200    26   /* Matsushita MN10200.  */
  #define EM_PJ         27   /* picoJava.  */

Or, if you do not like the fill-the-gaps approach, how about:

  #define EM_AVR        83   /* Atmel AVR 8-bit microcontroller.  */
  #define EM_FR30       84   /* Fujitsu FR30.  */
  #define EM_D10V       85   /* Mitsubishi D10V.  */
  #define EM_D30V       86   /* Mitsubishi D30V.  */
  #define EM_ALPHA      87   /* DEC Alpha.  */
  #define EM_V850       88   /* NEC v850.  */
  #define EM_ARC        89   /* ARC Cores.  */
  #define EM_M32R       90   /* Mitsubishi M32R.  */
  #define EM_MN10300    91   /* Matsushita MN10300.  */
  #define EM_MN10200    92   /* Matsushita MN10200.  */
  #define EM_PJ         93   /* picoJava.  */

Note - I have also added picoJava, which I had thought was an
officially sanctioned name (with a value of 99), but which does not
appear in the draft spec that I am currently using.

Cheers
	Nick