Support Xilinx MicroBlaze processor - patch 1

[Nick Clifton]

Hi Michael,

> Cleaned comments, indents, braces.

Approved and applied.

Note - I have tidied up the formatting in various places.

A few things are missing from your patches:

   * An entry in gas/NEWS mentioning the support for the new target.

   * Some microblaze specific tests in the gas testsuite, and possibly 
the linker testsuite as well.

I have also not applied the patch to config.sub - this must be submitted 
separately to config-patches@gnu.org.

I will apply the patch to the top level configure and configure.ac files 
separately as this patch must be propagated into the FSF gcc source 
repository as well.

Cheers
   Nick