Fix CI (#2061)

We had CI breakage that prevented this from being noticed before.

* Make binaryen.js not use NO_FILESYSTEM - need to investigate why recent emscripten changes broke our usage of that flag.
* Update a binaryen.js test.

Author: kripken

build-js.sh

@@ -40,7 +40,7 @@ fi
 EMCC_ARGS="-std=c++11 --memory-init-file 0"
 EMCC_ARGS="$EMCC_ARGS -s ALLOW_MEMORY_GROWTH=1"
 EMCC_ARGS="$EMCC_ARGS -s DEMANGLE_SUPPORT=1"
-EMCC_ARGS="$EMCC_ARGS -s NO_FILESYSTEM=1"
+EMCC_ARGS="$EMCC_ARGS -s NO_FILESYSTEM=0"
 EMCC_ARGS="$EMCC_ARGS -s WASM=0"
 EMCC_ARGS="$EMCC_ARGS -s ERROR_ON_UNDEFINED_SYMBOLS=1"
 EMCC_ARGS="$EMCC_ARGS -s BINARYEN_ASYNC_COMPILATION=0"

test/binaryen.js/emit_asmjs.js.txt

@@ -28,7 +28,7 @@ function asmFunc(global, env, buffer) {
 
  var FUNCTION_TABLE = [];
  return {
-  main: main
+  "main": main
  };
 }