3 consumers built fine in poudriere.
```
$ poudriere testport -j 132amd64 multimedia/libva-glx
[...]
=>> Checking shared library dependencies
0x0000000000000001 NEEDED Shared library: [libGL.so.1]
0x0000000000000001 NEEDED Shared library: [libX11.so.6]
0x0000000000000001 NEEDED Shared library: [libc.so.7]
0x0000000000000001 NEEDED Shared library: [libdl.so.1]
0x0000000000000001 NEEDED Shared library: [libva-x11.so.2]
0x0000000000000001 NEEDED Shared library: [libva.so.2]
```
```lang=diff
$ pkg info -xd glx
libva-glx-2.20.0_1:
- libxcb-1.15_1
- libXfixes-6.0.0
- libXext-1.3.4,1
- libX11-1.8.7,1
libva-2.20.0_1
libglvnd-1.7.0
- libdrm-2.4.120,1
```
Note, libX11 is currently tracked by `main` (aka `libva`). After `X11` is subpackaged `GLX_IMPLIES` will be `SELF_DEPENDS.glx+=x11`.