asc: force use of C++11 during build

Log of error: https://hydra.nixos.org/log/f8yhxkg3zqqsz9ljbi98fsiibihvdbfd-asc-2.6.0.0.drv
Refs: ZHF: #172160
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

pkgs/games/asc/default.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [ "--disable-paragui" "--disable-paraguitest" ];
 
-  NIX_CFLAGS_COMPILE = "-fpermissive -Wno-error=narrowing"; # I'm too lazy to catch all gcc47-related problems
+  NIX_CFLAGS_COMPILE = "-fpermissive -Wno-error=narrowing -std=c++11"; # I'm too lazy to catch all gcc47-related problems
   hardeningDisable = [ "format" ];
 
   buildInputs = [