Add <disables> example for platform

Add `` example for `platform` in https://github.com/adoptium/TKG/tree/master/examples

For example:

```

disable on JDK8 x86-64_linux
8
x86-64_linux

```

```

disable on eclipse vendor
eclipse


Only applicable on aix, pliunx, xlinux, wins64 and zlinux atm
^((?!(ppc64_aix|ppc64le_linux|x86-64_linux|x86-64_windows|s390x_linux)).)*$

```

Start in the examples/ directory and compare existing examples with the requested platform cases. Add the platform example using the shown x86-64_linux value and confirm the new entry matches the surrounding example format.

Written by the indexing model from the issue text.