message: Use single-file builds for codecbench.js
  When using Emscripten, we no longer generate .wasm files which means
  that there's a clean distinction between WASI and Emscripten builds.
diff: @@ -145,10 +145,10 @@ codecbench: tools/codecbench.cpp $(LIBRARY)
  $(CXX) $^ $(CXXFLAGS) $(LDFLAGS) -o $@
  codecbench.js: tools/codecbench.cpp ${LIBRARY_SOURCES}
  - emcc $^ -O3 -g -DNDEBUG -s TOTAL_MEMORY=268435456 -o $@
  + emcc $^ -O3 -g -DNDEBUG -s TOTAL_MEMORY=268435456 -s SINGLE_FILE=1 -o $@
  codecbench-simd.js: tools/codecbench.cpp ${LIBRARY_SOURCES}
  - emcc $^ -O3 -g -DNDEBUG -s TOTAL_MEMORY=268435456 -msimd128 -o $@
  + emcc $^ -O3 -g -DNDEBUG -s TOTAL_MEMORY=268435456 -s SINGLE_FILE=1 -msimd128 -o $@
  codecbench.wasm: tools/codecbench.cpp ${LIBRARY_SOURCES}
  $(WASMCC) $^ -fno-exceptions --target=wasm32-wasi --sysroot=$(WASI_SDK) -lc++ -lc++abi -O3 -g -DNDEBUG -o $@
  