dmd: pull in missing libgcc.so dependency

[trofi]

Without the change autopatchelf fails to find the dependency as:

searching for dependencies of ...-dmd-bootstrap-2.090.1/bin/dmd
    libgcc_s.so.1 -> not found!
auto-patchelf: 6 dependencies could not be satisfied

Full build log: https://hydra.nixos.org/log/plma45m19p0cm1i04c4qzmfi54n38ydk-dmd-bootstrap-2.090.1.drv

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[trofi]

dmd bootstrap binary now gets patchelfed successfully. But the dmd fails one test in testsuite:

       > FAILED targets:
       > - runnable_cxx/cppa.d
       > make: *** [Makefile:210: run_all_tests] Error 1

At least we have some forward progress.

[trofi]

The link failure itself looks like a dmd problem in locating correct libstdc++:

Test 'runnable_cxx/cppa.d' failed. The logged output:
g++ -m64 -c runnable_cxx/extra-files/cppb.cpp -o test_results/runnable_cxx/cppb.cpp.o -std=c++11
/build/dmd/generated/linux/release/64/dmd -conf= -m64 -Irunnable_cxx -checkaction=C  -fPIC -L-lstdc++ -L--no-demangle  -odtest_results/runnable_cxx -oftest_results/runnable_cxx/cppa_0  runnable_cxx/cppa.d test_results/runnable_cxx/cppb.cpp.o 
/nix/store/f4qnwzv6y0nq8lix33jr5ykkyybs6fxf-binutils-2.40/bin/ld: test_results/runnable_cxx/cppa_0.o: in function `_ZNSaIiE10deallocateEPim':
runnable_cxx/cppa.d:(.text._ZNSaIiE10deallocateEPim[_ZNSaIiE10deallocateEPim]+0x5): undefined reference to `_ZN9__gnu_cxx13new_allocatorIiE10deallocateEPim'
collect2: error: ld returned 1 exit status
Error: linker exited with status 1

[trofi]

Added #206907 (comment) to fix dmd's test suite first.