gdb: Add native GDB support for ARC
This adds support of so-called "native" GDB for ARC processors.
It was submitted upstream a bit late for inclusion in v10.x,
but already in the upstream "master" branch and will be an essential part
of v11.1 whenever it happens.
These are the changes from upstream "master":
* https://sourceware.org/git?p=binutils-gdb.git;a=commit;h=
b4e3cd0440109d0a5552d3313ccbd35c8103335b
* https://sourceware.org/git?p=binutils-gdb.git;a=commit;h=
d4af727286e3a9f177ba11677fbd3a012d36558a
* https://sourceware.org/git?p=binutils-gdb.git;a=commit;h=
46023bbe81355230b4e7b76d3084337823d02362
* https://sourceware.org/git?p=binutils-gdb.git;a=commit;h=
04c9f85efcd8df5fc482ce97c0104cc7dd5d19e6
Thanks a bunch to Anton & Shahab who made it possible!
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
