[all-commits] [llvm/llvm-project] 2ffe0e: Provide anchor for compiler extensions

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  Branch: refs/heads/release/11.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 2ffe0eed51af296a4cf6be73c1b514c91e722114
      https://github.com/llvm/llvm-project/commit/2ffe0eed51af296a4cf6be73c1b514c91e722114
  Author: Serge Guelton <sguelton at redhat.com>
  Date:   2020-09-08 (Tue, 08 Sep 2020)

  Changed paths:
    M llvm/lib/Extensions/Extensions.cpp
    M llvm/lib/Extensions/LLVMBuild.txt

  Log Message:
  -----------
  Provide anchor for compiler extensions

This patch is cherry-picked from 04b0a4e22e3b4549f9d241f8a9f37eebecb62a31, and
amended to prevent an undefined reference to `llvm::EnableABIBreakingChecks'

(cherry picked from commit 38778e1087b2825e91b07ce4570c70815b49dcdc)