boost::process:child/args not behaving the same on Ubuntu 20.04LTS as Android (embedded Linux)

Boost version: 1.76
NDK: android-ndk-r23
ANDROID_ABI=arm64-v8a
ANDROID_PLATFORM=android-24

I'm seeing different behaviour on Ubuntu than Android using the same version of boost. Here are some examples:

```cpp
namespace bp = boost::process;

bp::child c("ls"); // OK on Ubuntu, OK on Android
bp::child c(bp::search_path("ls")); // OK on Ubuntu, fails on Android
bp::child c(bp::search_path("ls"), bp::args("-l")); // OK on Ubuntu, fails on Android
```

All calls were followed by `c.wait();`

Error message is the same:
`
terminating with uncaught exception of type boost::process::process_error: execve failed: No such file or directory. Aborted
`

My PATH (Android)

`
msm8996:/data/local/tmp # echo $PATH
/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
`

Has anyone else experienced this? I'm unable to pass args (second parameter) on Android. Also, boost:process::search_path doesn't seem to work at all on Android.