The Oniro repository changed license of all Yocto/OE build system 
meta-data/files/patches from Apache to MIT to make collaboration with the upstream
easier: eclipse/oniro-core/oniro#824

Relicense all files in this repository to MIT to align with Oniro core.

Due to how these Yocto/OE layers interact with upstream layers (including oe-core), 
having parts of our layers licensed under Apache when most (if not all) of our 
upstream dependencies (and generally the entire ecosystem) are MIT, would pose 
a couple of issues:
        
- Using our layers would introduce a new license to a downstream consumer that 
    needs to be assessed.
- Reusing parts of our code would pose an issue of relicensing on Oniro or the 
    downstream side.
 - Upstreaming Apache code would need relicensing on the Oniro side before 
    upstream could accept contributions (unless upstream is up for a license addition 
    which in most cases is not an option).
- Mistakes can happen and end up with "silent" relicensing in different situations.

To avoid all the above we propose to change all the existing Yocto/OE Apache-2.0 
files in this repository to MIT.

Fixes: #1



Signed-off-by: Francesco Pham <francesco.pham@huawei.com>