Obsolete GDB's ARC support

[Reply-to: set to gdb at sources redhat com]

Hello,

The ARC target, currently included in GDB, has been identified as a 
candidate for obsolesence. This target does not use GDB's multi-arch 
framework and all such targets are either being obsoleted or converted.

If you have any reservations over GDB's move to obsolete the ARC target 
(and/or are in a position to multi-arch it) please contact the gdb@ 
discussion list (reply-to set).

Andrew Cagney
GDB Adminstrator
http://www.gnu.org/software/gdb/