[Backport staging-22.11] gcc/11: apply upstream fix 103910 so openjdk builds #218468
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Our openjdk derivations fail to build with `-march=opteron` (via either `NIX_CFLAGS_COMPILE` or `hostPlatform.gcc.arch`). This was fixed upstream in gcc12 but not carried back to gcc11: https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=d243f4009d8071b734df16cd70f4c5d09a373769 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103910 Since gcc11 is still nixpkgs' primary compiler, this PR cherry-picks the fix out of gcc12. Unfortunately since `-march=` can be added after the `gcc11` derivation is built we can't apply this patch conditionally (which we don't usually do anyways). (cherry picked from commit b83f032)
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Bot-based backport to
staging-22.11, triggered by a label in #212363.