Building C code for `powerpc-linux-gnueabi(hf)` fails due to duplicate `lgammal` symbol

### Zig Version

0.13.0

### Steps to Reproduce and Observed Behavior

```console
❯ cat test.c
#include <stdio.h>
int main(){printf("hello\n");}
❯ zig cc test.c -target powerpc-linux-gnueabi
<unknown>:0: error: symbol 'lgammal' is already defined
```

Also happens for `powerpc-linux-gnueabihf`, but not `powerpc-linux-musl`.

### Expected Behavior

No error.