qtlocation: fix darwin build

[badmutex]

A dependency (boost) makes use of std::auto_ptr, which is no longer
supported in C++17 in Clang. This change re-enables std::auto_ptr
capabilities.

/cc ZHF #36454

This is a dependency for nextcloud-client (#36788) and owncloud-client.

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip" No change on Linux. On Darwin some still have build failures.
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

---

[knedlsepp]

I guess after boost 1.66 this won't be necessary: https://svn.boost.org/trac10/ticket/11622 , which is odd, because this should already be in 18.03.

[LnL7]

@GrahamcOfBorg build qt5.qtlocation

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: qt5.qtlocation

Partial log (click to expand)

/nix/store/6py9zwpf8pyp8sjyb6908fi2kdprrnxb-qtlocation-5.10.1-bin

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: qt5.qtlocation

Partial log (click to expand)

/nix/store/j1gnvpzwybd3hdqlqsa96x6i55dgb1qx-qtlocation-5.10.1-bin

[GrahamcOfBorg]

Success on x86_64-darwin (full log)

Attempted: qt5.qtlocation

Partial log (click to expand)

stripping (with command strip and flags -S) in /nix/store/mfj027damanfk1bs5ww7hwdzw8w9xagi-qtlocation-5.10.1-dev/lib
patching script interpreter paths in /nix/store/mfj027damanfk1bs5ww7hwdzw8w9xagi-qtlocation-5.10.1-dev
postPatchMkspecs
fixQtModulePaths: Fixing module paths in `/nix/store/mfj027damanfk1bs5ww7hwdzw8w9xagi-qtlocation-5.10.1-dev/mkspecs/modules/qt_lib_positioning.pri'...
fixQtModulePaths: Fixing module paths in `/nix/store/mfj027damanfk1bs5ww7hwdzw8w9xagi-qtlocation-5.10.1-dev/mkspecs/modules/qt_lib_location.pri'...
fixQtModulePaths: Fixing module paths in `/nix/store/mfj027damanfk1bs5ww7hwdzw8w9xagi-qtlocation-5.10.1-dev/mkspecs/modules/qt_lib_positioning_private.pri'...
fixQtModulePaths: Fixing module paths in `/nix/store/mfj027damanfk1bs5ww7hwdzw8w9xagi-qtlocation-5.10.1-dev/mkspecs/modules/qt_lib_location_private.pri'...
postPatchMkspecs
postPatchMkspecs
/nix/store/frbnnqpdfldrh55ziydnjiwx4vv6f8lq-qtlocation-5.10.1-bin