[ISSUE] Package `j` provides `libj.so`, but it's not linked or copied into the default linker search path

[subsetpark <subsetpark@users.noreply.github.com>]

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New issue by subsetpark on void-packages repository

https://github.com/void-linux/void-packages/issues/32640

Description:
### System

* xuname:  `Void 5.13.9_1 x86_64 GenuineIntel uptodate rrrmFFFF`
* package:  `j-901.f_1`

### Expected behavior

`libj.so` is available on the default dynamic linker search path (ie, a system call like `dlopen("j")` should locate `libj.so`)

### Actual behavior

`libj.so` is present and functional at `/usr/lib64/j/j64/libj.so`, but not available in `/usr/lib64`.

### Steps to reproduce the behavior

Attempt to use dynamic linking to access the `libj.so` file provided in the J distribution.

Here's a minimal C program that demonstrates the difference (obviously, the `janet` package is installed on my system!):

```c
#include <dlfcn.h>
#include <stdio.h>

int main(int argc, char **argv) {
  void *p = dlopen("libjanet.so", RTLD_NOW);
  printf("Janet DLL pointer: %p\n", p);
  void *q = dlopen("libj.so", RTLD_NOW);
  printf("J DLL pointer: %p\n", q);
}
```

Here's the execution example on my system:

```
Desktop [] ⊕ gcc ex.c -ldl                                                                                              
Desktop [] ⊕ ./a.out                                                                                                    
Janet DLL pointer: 0x5561857862c0
J DLL pointer: (nil)
```