[binutils-gdb] RISC-V: Allow 32-bit BFD to handle 64-bit objects

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 763a5fa4f330d6d3859c94a69ba1fcab09330cf9 ***

Author: Palmer Dabbelt <palmer@dabbelt.com>
Branch: master
Commit: 763a5fa4f330d6d3859c94a69ba1fcab09330cf9

RISC-V: Allow 32-bit BFD to handle 64-bit objects

We've been telling people that the riscv32-* and riscv64-* toolchains
are exactly the same, but it turns out we were lying: the riscv32-* BFD
doesn't handle 64-bit objects.  This fixes that difference, so the ports
are actually the same.

bfd/ChangeLog

2017-05-01  Palmer Dabbelt  <palmer@dabbelt.com>

        * config.bfd (riscv32-*): Enable rv64.