cbc: fix build with clang 16

pkgs/applications/science/math/cbc/default.nix

···
   };
 
   # or-tools has a hard dependency on Cbc static libraries, so we build both
-  configureFlags = [ "-C" "--enable-static" ];
+  configureFlags = [ "-C" "--enable-static" ]
+    ++ lib.optionals stdenv.cc.isClang [ "CXXFLAGS=-std=c++14" ];
 
   enableParallelBuilding = true;