[Bug] `libstdc++` error on Termux

When trying to compile `rusty_ffmpeg` with `link_system_ffmpeg` on Termux, I couldn't, due to the following error:
```
Compiling rusty_ffmpeg v0.13.1+ffmpeg.6.0
error: failed to add native library /data/data/com.termux/files/usr/lib/libstdc++.a: file too small to be an archive

error: could not compile `rusty_ffmpeg` (lib) due to previous error
zsh: exit 101 CARGO_INCREMENTAL=0 cargo r
```

The contents of `libstdc++.a` are as follows:
```asm
INPUT(-lc++_static -lc++abi)
```