[PATCH, FT32] initial support

[James Bowman]

(Thanks to everyone for the review. I have reworked the submission as suggested. This does build cleanly with "--enable-werror-always")

FT32 is a new high performance 32-bit RISC core developed by FTDI for embedded applications.

Support for FT32 has already been added to binutils. This patch adds FT32 support to gcc.
        
Please can someone review it, and if appropriate commit it, as I do not have write access to the tree.

The FSF have acknowledged receipt of FTDI's copyright assignment papers.

Thanks very much. ChangeLog entry:

2014-02-11  James Bowman  <james.bowman@ftdichip.com>

        * configure.ac: FT32 target added
        * libgcc/config.host: FT32 target added
        * gcc/config/ft32/: FT32 target added
        * libgcc/config/ft32/: FT32 target added
        * gcc/doc/install.texi, invoke.texi, md.texi: FT32 details added
        * gcc/doc/contrib.texi, MAINTAINERS: self added
        * contrib/config-list.mk: FT32 target added
        * configure: Regenerated

--
James Bowman
FTDI Open Source Liaison
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