[crosstool-ng/crosstool-ng] 7b929a: Disallow linux versions before 4.8 for ARC

[crosstool-ng/crosstool-ng] 7b929a: Disallow linux versions before 4.8 for ARC

[Alexey Neyman]

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  Branch: refs/heads/master
  Home:   https://github.com/crosstool-ng/crosstool-ng
  Commit: 7b929a528ef8b78ecdf295d4c0536b4707e358e6
      https://github.com/crosstool-ng/crosstool-ng/commit/7b929a528ef8b78ecdf295d4c0536b4707e358e6
  Author: Alexey Brodkin <abrodkin@synopsys.com>
  Date:   2018-10-01 (Mon, 01 Oct 2018)

  Changed paths:
    M config/arch/arc.in
    M packages/linux/package.desc

  Log Message:
  -----------
  Disallow linux versions before 4.8 for ARC

Inspired by a similar fix for AArch64 in 481cbaac9b23.

The point is in Linux v4.8 we introduced new ABIv4 which is now used in
both Linux kernel and up-to-date GNU tools for ARC (based on GCC 6.x+).
See [1] for more details.

[1] https://github.com/foss-for-synopsys-dwc-arc-processors/linux/wiki/ARC-Linux-Syscall-ABI-Compatibility

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>


  Commit: 7c4c6892b9a5ea8e989ecb8a120db4d9f3aa46f6
      https://github.com/crosstool-ng/crosstool-ng/commit/7c4c6892b9a5ea8e989ecb8a120db4d9f3aa46f6
  Author: Alexey Neyman <stilor@att.net>
  Date:   2018-10-29 (Mon, 29 Oct 2018)

  Changed paths:
    M config/arch/arc.in
    M packages/linux/package.desc

  Log Message:
  -----------
  Merge pull request #1044 from abrodkin/topic-arc-linux-4.8

Disallow linux versions before 4.8 for ARC


Compare: https://github.com/crosstool-ng/crosstool-ng/compare/3b1e2f6d8686...7c4c6892b9a5
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