nix-build: Print stats even in failing builds

(cherry picked from commit 87702532d2)

src/nix-build/nix-build.cc

@@ -305,6 +305,8 @@ void mainWrapped(int argc, char * * argv)
         }
     }
 
+    state->printStats();
+
     auto buildPaths = [&](const PathSet & paths) {
         /* Note: we do this even when !printMissing to efficiently
            fetch binary cache data. */
@@ -495,7 +497,6 @@ void mainWrapped(int argc, char * * argv)
 
         for (auto & path : outPaths)
             std::cout << path << '\n';
-        state->printStats();
     }
 }