local.conf: add example to use external angstrom toolchain
local.conf: add example to use external angstrom toolchain

Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>

dave-billin/overo-ui-moos-auv,nx111/openembeded_openpli2.1_nx111,sledz/oe,SIFTeam/openembedded,BlackPole/bp-openembedded,BlackPole/bp-openembedded,SIFTeam/openembedded,nx111/openembeded_openpli2.1_nx111,sledz/oe,BlackPole/bp-openembedded,sampov2/audio-openembedded,sampov2/audio-openembedded,BlackPole/bp-openembedded,sledz/oe,dave-billin/overo-ui-moos-auv,sledz/oe,nx111/openembeded_openpli2.1_nx111,mrchapp/arago-oe-dev,dave-billin/overo-ui-moos-auv,SIFTeam/openembedded,mrchapp/arago-oe-dev,mrchapp/arago-oe-dev,sampov2/audio-openembedded,mrchapp/arago-oe-dev,SIFTeam/openembedded,nx111/openembeded_openpli2.1_nx111,dave-billin/overo-ui-moos-auv,mrchapp/arago-oe-dev,SIFTeam/openembedded,dave-billin/overo-ui-moos-auv,sampov2/audio-openembedded,mrchapp/arago-oe-dev,SIFTeam/openembedded,sledz/oe,mrchapp/arago-oe-dev,nx111/openembeded_openpli2.1_nx111,sampov2/audio-openembedded,sampov2/audio-openembedded,sledz/oe,nx111/openembeded_openpli2.1_nx111,dave-billin/overo-ui-moos-auv,BlackPole/bp-openembedded,BlackPole/bp-openembedded,SIFTeam/openembedded,nx111/openembeded_openpli2.1_nx111,nx111/openembeded_openpli2.1_nx111,dave-billin/overo-ui-moos-auv,BlackPole/bp-openembedded,sledz/oe,sampov2/audio-openembedded