Snow Crash test fails to build with GCC 4.7

[zdne]

On gcc (Ubuntu/Linaro 4.7.3-2ubuntu1~12.04) 4.7.3:

flock out/Release/linker.lock g++ -pthread -rdynamic -m64 -stdlib=libstdc++  -o out/Release/test-snowcrash -Wl,--start-group out/Release/obj.target/test-snowcrash/test/test-AssetParser.o out/Release/obj.target/test-snowcrash/test/test-Blueprint.o out/Release/obj.target/test-snowcrash/test/test-BlueprintParser.o out/Release/obj.target/test-snowcrash/test/test-HeaderParser.o out/Release/obj.target/test-snowcrash/test/test-MarkdownBlock.o out/Release/obj.target/test-snowcrash/test/test-MarkdownParser.o out/Release/obj.target/test-snowcrash/test/test-MethodParser.o out/Release/obj.target/test-snowcrash/test/test-Parser.o out/Release/obj.target/test-snowcrash/test/test-PayloadParser.o out/Release/obj.target/test-snowcrash/test/test-RegexMatch.o out/Release/obj.target/test-snowcrash/test/test-ResouceGroupParser.o out/Release/obj.target/test-snowcrash/test/test-ResourceParser.o out/Release/obj.target/test-snowcrash/test/test-SymbolTable.o out/Release/obj.target/test-snowcrash/test/test-snowcrash.o out/Release/obj.target/libsnowcrash.a out/Release/obj.target/libsundown.a -Wl,--end-group

g++: error: unrecognized command line option '-stdlib=libstdc++'