Fix `emsdk activate` breaking configuration file (#602)
Fixes: #587
> If nodejs is not installed by `emsdk`, the output ".emscripten" file by `emsdk activate` will look like this.
>
> ```python
> NODE_JS = ''/usr/bin/nodejs''
> # too many quotes
> ```
>
> `emcc` fails to execute by this syntax error.
>
> I think fixing [this line](https://github.com/emscripten-core/emsdk/blob/1.40.1/emsdk.py#L1450) could be a solution.
>
> ```python
> activated_config['NODE_JS'] = "'%s'" % node_fallback
> # the value will be quoted later again
> ```
diff --git a/emsdk.py b/emsdk.py
index 89e9d68..14ce884 100755
--- a/emsdk.py
+++ b/emsdk.py
@@ -1452,7 +1452,7 @@
node_fallback = which('nodejs')
if not node_fallback:
node_fallback = 'node'
- activated_config['NODE_JS'] = "'%s'" % node_fallback
+ activated_config['NODE_JS'] = node_fallback
for name, value in activated_config.items():
cfg += name + " = '" + value + "'\n"
