Build mysteriously fails with {"type":"module"} package.json in the parent directory

Emscripten build of a C library ([liquid-dsp](https://github.com/jgaeddert/liquid-dsp)) mysteriously fails when the **parent** directory has `package.json` containing `{"type":"module"}`.

There is a similar bug #13551, from February 2021, with different library and different symptoms. But with exactly the same core reason of `{"type":"module"}` changing Emscripten behaviour in a subdirectory.

I spent two hours debugging this problem. It breaks the fundamental assumption that nothing **outside** of the project directory should matter during the build.

Any ideas about why it could be happening? I would love to help fix it in Emscripten.

**Failing command line in full:**

```
mkdir emscripten-bug
cd emscripten-bug/

# removing this line fixes the build 🤯
echo '{"type":"module"}' > package.json

git clone https://github.com/jgaeddert/liquid-dsp
cd liquid-dsp
emmake make clean # if repeating this process
./bootstrap.sh
emconfigure ./configure --host=wasm32
emmake make VERBOSE=1
```

Build mysteriously fails with:

```
/Users/shamrin/src/emsdk/upstream/emscripten/emcc -g -O2 -Wall -fPIC -Wno-deprecated -Wno-deprecated-declarations -I. -Iinclude -c -o src/audio/src/cvsd.o src/audio/src/cvsd.c
src/audio/src/cvsd.c:70:21: error: call to undeclared function 'rpl_malloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
cvsd q = (cvsd) malloc(sizeof(struct cvsd_s));
^
./config.h:217:16: note: expanded from macro 'malloc'
#define malloc rpl_malloc
^
1 error generated.
emcc: error: '/Users/shamrin/src/emsdk/upstream/bin/clang -target wasm32-unknown-emscripten -DEMSCRIPTEN -D__EMSCRIPTEN_major__=3 -D__EMSCRIPTEN_minor__=1 -D__EMSCRIPTEN_tiny__=15 -fignore-exceptions -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -Werror=implicit-function-declaration -Xclang -iwithsysroot/include/SDL --sysroot=/Users/shamrin/src/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/compat -g3 -O2 -Wall -fPIC -Wno-deprecated -Wno-deprecated-declarations -I. -Iinclude -c src/audio/src/cvsd.c -o src/audio/src/cvsd.o' failed (returned 1)
make: *** [src/audio/src/cvsd.o] Error 1
emmake: error: 'make VERBOSE=1' failed (returned 2)
```

**Version of emscripten/emsdk:**

```
$ emcc -v
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.15 (8b4443a87f5eab5dbb9adb690f9ebed0a9da4bd9)
clang version 15.0.0 (https://github.com/llvm/llvm-project 27abff670bc7ad9702c4f9fc8b82aae6b530bf0f)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /Users/shamrin/src/emsdk/upstream/bin
```