[crosstool-ng/crosstool-ng] f232d6: Add an ability to modify an exported variable

[Alexey Neyman <stilor at att dot net>]

  Branch: refs/heads/master
  Home:   https://github.com/crosstool-ng/crosstool-ng
  Commit: f232d6d09a895b4be25cd01008f76afd3a673ac2
      https://github.com/crosstool-ng/crosstool-ng/commit/f232d6d09a895b4be25cd01008f76afd3a673ac2
  Author: Alexey Neyman <stilor@att.net>
  Date:   2018-11-01 (Thu, 01 Nov 2018)

  Changed paths:
    M scripts/build/binutils/binutils.sh
    M scripts/functions

  Log Message:
  -----------
  Add an ability to modify an exported variable

... and use that ability to permanently set CTNG_LD_IS in case gold is default linker
and we're building glibc.

Fixes #988. This was a long-standing breakage in crosstool-NG (at least since it began
to run each step in a sub-shell).

Signed-off-by: Alexey Neyman <stilor@att.net>


  Commit: cc403506161efd9209dd1c543ca0c458ee5439b6
      https://github.com/crosstool-ng/crosstool-ng/commit/cc403506161efd9209dd1c543ca0c458ee5439b6
  Author: Alexey Neyman <stilor@att.net>
  Date:   2018-11-01 (Thu, 01 Nov 2018)

  Changed paths:
    M scripts/build/binutils/binutils.sh
    M scripts/functions

  Log Message:
  -----------
  Merge pull request #1078 from stilor/force-bfd-linker

Add an ability to modify an exported variable


Compare: https://github.com/crosstool-ng/crosstool-ng/compare/7c4c6892b9a5...cc403506161e
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