layer.conf: Add LAYERSERIES_COMPAT
layer.conf: Add LAYERSERIES_COMPAT

Changed my other sources recently from rocko to sumo. For both variants
meta-browser had no relese specific issues.

Signed-off-by: Andreas Müller <d72a15aaaca3a7afa855175c72dc8d2e05931e32@gmail.com>

OSSystems/meta-browser,kraj/meta-browser,webdino/meta-browser,schnitzeltony/meta-browser,OSSystems/meta-browser,OSSystems/meta-browser,kraj/meta-browser,webdino/meta-browser,twoerner/meta-browser,webdino/meta-browser,twoerner/meta-browser,kraj/meta-browser,twoerner/meta-browser,webdino/meta-browser,schnitzeltony/meta-browser,webdino/meta-browser,kraj/meta-browser,twoerner/meta-browser,schnitzeltony/meta-browser,OSSystems/meta-browser,schnitzeltony/meta-browser