[crosstool-ng/crosstool-ng] af8da8: riscv64: add rv64gc bare-metal sample

[Alexey Neyman]

  Branch: refs/heads/master
  Home:   https://github.com/crosstool-ng/crosstool-ng
  Commit: af8da8b181c43fe97de63c39e1d14e6c59a8950b
      https://github.com/crosstool-ng/crosstool-ng/commit/af8da8b181c43fe97de63c39e1d14e6c59a8950b
  Author: Paul Walmsley <paul.walmsley@sifive.com>
  Date:   2018-09-24 (Mon, 24 Sep 2018)

  Changed paths:
    A samples/riscv64-unknown-elf/crosstool.config
    A samples/riscv64-unknown-elf/reported.by

  Log Message:
  -----------
  riscv64: add rv64gc bare-metal sample

This sample works well for building the open-source first stage
bootloader for the SiFive U540 device (and similar):

https://github.com/sifive/freedom-u540-c000-bootloader

Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>


  Commit: ea1072c29ba37f29ca3f60871935aa5ca3fcb9b6
      https://github.com/crosstool-ng/crosstool-ng/commit/ea1072c29ba37f29ca3f60871935aa5ca3fcb9b6
  Author: Alexey Neyman <stilor@att.net>
  Date:   2018-09-25 (Tue, 25 Sep 2018)

  Changed paths:
    A samples/riscv64-unknown-elf/crosstool.config
    A samples/riscv64-unknown-elf/reported.by

  Log Message:
  -----------
  Merge pull request #1027 from sifive/dev/paulw/rv64-bare-metal

riscv64: samples: add rv64gc bare-metal sample configuration


Compare: https://github.com/crosstool-ng/crosstool-ng/compare/49520dbf6d55...ea1072c29ba3
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