grive2: pull gcc-12 upstream fix
Without the change build fails on `master` as:
[ 14%] Building CXX object libgrive/CMakeFiles/grive.dir/src/base/Syncer.cc.o
In file included from /build/source/libgrive/src/base/Syncer.cc:20:
/build/source/libgrive/src/base/Syncer.hh:58:22: error: 'unique_ptr' in namespace 'std' does not name a template type
58 | virtual std::unique_ptr<Feed> GetFolders() = 0;
| ^~~~~~~~~~
Full build log: https://hydra.nixos.org/log/48jk4w7l1frlf6x8xjli2vyqqxk24ib1-grive2-0.5.3.drv