Cache inclusivity?

This is probably an issue for Hwloc itself, but I figured I'd raise it here first.

Hwloc checks the inclusivity of the caches, e.g. running
```sh
hwloc-gather-topology /tmp/myhost
```
on the command line with create a `.xml` file that includes, among other output
```xml








```
Indicating that none of the caches are inclusive.

Hwloc uses cpuid for [AMD](https://github.com/open-mpi/hwloc/blob/263908a2c1f21c0e221a8d1f6472daf3a1fc07b9/hwloc/topology-x86.c#L350) and [Intel](https://github.com/open-mpi/hwloc/blob/263908a2c1f21c0e221a8d1f6472daf3a1fc07b9/hwloc/topology-x86.c#L427) CPUs, storing the results in a `struct`:
```C
struct cacheinfo {
hwloc_obj_cache_type_t type;
unsigned level;
unsigned nbthreads_sharing;
unsigned cacheid;

unsigned linesize;
unsigned linepart;
int inclusive;
int ways;
unsigned sets;
unsigned long size;
};
```
But this seems to be an undocumented internal.
The documented [hwloc_cache_attr_s](https://www.open-mpi.org/projects/hwloc/doc/v2.3.0/a00220.php) that you can load with the API is missing several of these fields.

There is a documented [hwloc_obj_get_info_by_name](https://www.open-mpi.org/projects/hwloc/doc/v2.4.0/a00159.php#gab358661a92bb27d8542b255cc9f6f25e) which [is used to query "Inclusive"](https://github.com/open-mpi/hwloc/blob/9e3c2b955852dbad7c8fd7dadc25ca98115f2210/hwloc/topology-x86.c#L1194), but `nm -D` doesn't show that symbol, and it'd take some work to figure out how to create the argument it takes (and if that object is a `cacheinfo`, we could just read the `inclusive` directly).
So perhaps it's a Hwloc issue to ask about an API for this?

Start by comparing the Julia wrapper's exposed cache attributes with hwloc_cache_attr_s and the documented hwloc_obj_get_info_by_name API. Read the linked topology-x86.c sections to understand how cache inclusivity is detected. Done means establishing and documenting a supported way to query inclusivity, if the project accepts that API scope.

Written by the indexing model from the issue text.