Snippets for nix 2.31.5 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/community/nix/nix-2.31.5-r3.log.

• ../src/libutil-tests/config.cc:186:41: warning: space between quotes and suffix is deprecated in C++23 [-Wdeprecated-literal-operator]
    186 |     using nlohmann::literals::operator"" _json;
        |                                         ^
        |                                         -
  

• ../src/libutil-tests/config.cc:212:41: warning: space between quotes and suffix is deprecated in C++23 [-Wdeprecated-literal-operator]
    212 |     using nlohmann::literals::operator"" _json;
        |                                         ^
        |                                         -
  

• ../src/libstore/build/derivation-building-goal.cc:824:1: warning: '<anonymous>' may be used uninitialized [-Wmaybe-uninitialized]
    824 | }
        | ^
  

• ../src/libstore-tests/outputs-spec.cc:195:43: warning: space between quotes and suffix is deprecated in C++23 [-Wdeprecated-literal-operator]
    195 |         using nlohmann::literals::operator"" _json;          \
        |                                           ^~~~~~~~
  

• ../src/libstore-tests/outputs-spec.cc:201:43: warning: space between quotes and suffix is deprecated in C++23 [-Wdeprecated-literal-operator]
    201 |         using nlohmann::literals::operator"" _json;          \
        |                                           ^~~~~~~~
  

• /usr/include/boost/coroutine2/detail/state.hpp:70:11: warning: '((boost::coroutines2::detail::state_t*)this_4(D)->cb_)[4]' may be used uninitialized [-Wmaybe-uninitialized]
     70 |     l = l | r;
        |         ~~^~~
  

• /usr/include/boost/coroutine2/detail/state.hpp:70:11: warning: '((boost::coroutines2::detail::state_t*)this)[4]' may be used uninitialized [-Wmaybe-uninitialized]
     70 |     l = l | r;
        |         ~~^~~