image bbclass: add install_linguas method
image bbclass: add install_linguas method

* this method will install all linguas in $IMAGE_LINGUAS for all packages installed into the rootfs
* currently opkg only, guarded with a check

Martix/Eonos,sentient-energy/emsw-oe-mirror,rascalmicro/openembedded-rascal,JamesAng/goe,sledz/oe,yyli/overo-oe,crystalfontz/openembedded,Martix/Eonos,yyli/overo-oe,openembedded/openembedded,dave-billin/overo-ui-moos-auv,dave-billin/overo-ui-moos-auv,hulifox008/openembedded,buglabs/oe-buglabs,John-NY/overo-oe,bticino/openembedded,SIFTeam/openembedded,JamesAng/oe,buglabs/oe-buglabs,nzjrs/overo-openembedded,JamesAng/goe,giobauermeister/openembedded,nx111/openembeded_openpli2.1_nx111,yyli/overo-oe,sledz/oe,sutajiokousagi/openembedded,dellysunnymtech/sakoman-oe,bticino/openembedded,buglabs/oe-buglabs,philb/pbcl-oe-2010,dellysunnymtech/sakoman-oe,JamesAng/oe,openembedded/openembedded,hulifox008/openembedded,crystalfontz/openembedded,sutajiokousagi/openembedded,nx111/openembeded_openpli2.1_nx111,yyli/overo-oe,sampov2/audio-openembedded,openpli-arm/openembedded,nzjrs/overo-openembedded,BlackPole/bp-openembedded,mrchapp/arago-oe-dev,sampov2/audio-openembedded,giobauermeister/openembedded,dellysunnymtech/sakoman-oe,sutajiokousagi/openembedded,buglabs/oe-buglabs,giobauermeister/openembedded,thebohemian/openembedded,SIFTeam/openembedded,scottellis/overo-oe,openembedded/openembedded,dave-billin/overo-ui-moos-auv,mrchapp/arago-oe-dev,trini/openembedded,scottellis/overo-oe,dellysunnymtech/sakoman-oe,SIFTeam/openembedded,nx111/openembeded_openpli2.1_nx111,scottellis/overo-oe,bticino/openembedded,dellysunnymtech/sakoman-oe,philb/pbcl-oe-2010,JamesAng/goe,bticino/openembedded,openembedded/openembedded,scottellis/overo-oe,xifengchuo/openembedded,BlackPole/bp-openembedded,rascalmicro/openembedded-rascal,thebohemian/openembedded,anguslees/openembedded-android,thebohemian/openembedded,mrchapp/arago-oe-dev,hulifox008/openembedded,openembedded/openembedded,sampov2/audio-openembedded,openpli-arm/openembedded,sutajiokousagi/openembedded,hulifox008/openembedded,xifengchuo/openembedded,openpli-arm/openembedded,crystalfontz/openembedded,rascalmicro/openembedded-rascal,rascalmicro/openembedded-rascal,mrchapp/arago-oe-dev,yyli/overo-oe,John-NY/overo-oe,rascalmicro/openembedded-rascal,trini/openembedded,anguslees/openembedded-android,Martix/Eonos,sledz/oe,trini/openembedded,JamesAng/oe,BlackPole/bp-openembedded,anguslees/openembedded-android,BlackPole/bp-openembedded,openpli-arm/openembedded,libo/openembedded,giobauermeister/openembedded,thebohemian/openembedded,rascalmicro/openembedded-rascal,rascalmicro/openembedded-rascal,sentient-energy/emsw-oe-mirror,SIFTeam/openembedded,openembedded/openembedded,sampov2/audio-openembedded,John-NY/overo-oe,sampov2/audio-openembedded,sledz/oe,nx111/openembeded_openpli2.1_nx111,JamesAng/goe,hulifox008/openembedded,Martix/Eonos,BlackPole/bp-openembedded,xifengchuo/openembedded,JamesAng/goe,trini/openembedded,libo/openembedded,scottellis/overo-oe,nzjrs/overo-openembedded,trini/openembedded,sentient-energy/emsw-oe-mirror,buglabs/oe-buglabs,sutajiokousagi/openembedded,JamesAng/goe,dellysunnymtech/sakoman-oe,libo/openembedded,dave-billin/overo-ui-moos-auv,philb/pbcl-oe-2010,openpli-arm/openembedded,JamesAng/oe,xifengchuo/openembedded,trini/openembedded,bticino/openembedded,openpli-arm/openembedded,xifengchuo/openembedded,openembedded/openembedded,hulifox008/openembedded,John-NY/overo-oe,bticino/openembedded,sutajiokousagi/openembedded,thebohemian/openembedded,sledz/oe,xifengchuo/openembedded,sentient-energy/emsw-oe-mirror,nzjrs/overo-openembedded,John-NY/overo-oe,openembedded/openembedded,nzjrs/overo-openembedded,libo/openembedded,openembedded/openembedded,giobauermeister/openembedded,trini/openembedded,anguslees/openembedded-android,nx111/openembeded_openpli2.1_nx111,libo/openembedded,nzjrs/overo-openembedded,Martix/Eonos,JamesAng/oe,dave-billin/overo-ui-moos-auv,sledz/oe,nx111/openembeded_openpli2.1_nx111,JamesAng/oe,bticino/openembedded,Martix/Eonos,SIFTeam/openembedded,JamesAng/oe,John-NY/overo-oe,SIFTeam/openembedded,dave-billin/overo-ui-moos-auv,xifengchuo/openembedded,crystalfontz/openembedded,yyli/overo-oe,sledz/oe,buglabs/oe-buglabs,scottellis/overo-oe,nx111/openembeded_openpli2.1_nx111,Martix/Eonos,nzjrs/overo-openembedded,rascalmicro/openembedded-rascal,crystalfontz/openembedded,openembedded/openembedded,openpli-arm/openembedded,mrchapp/arago-oe-dev,philb/pbcl-oe-2010,sentient-energy/emsw-oe-mirror,philb/pbcl-oe-2010,crystalfontz/openembedded,BlackPole/bp-openembedded,libo/openembedded,mrchapp/arago-oe-dev,SIFTeam/openembedded,JamesAng/goe,dellysunnymtech/sakoman-oe,sentient-energy/emsw-oe-mirror,anguslees/openembedded-android,philb/pbcl-oe-2010,BlackPole/bp-openembedded,giobauermeister/openembedded,nx111/openembeded_openpli2.1_nx111,thebohemian/openembedded,thebohemian/openembedded,anguslees/openembedded-android,xifengchuo/openembedded,yyli/overo-oe,hulifox008/openembedded,scottellis/overo-oe,anguslees/openembedded-android,buglabs/oe-buglabs,dellysunnymtech/sakoman-oe,yyli/overo-oe,giobauermeister/openembedded,crystalfontz/openembedded,libo/openembedded,John-NY/overo-oe,mrchapp/arago-oe-dev,philb/pbcl-oe-2010,giobauermeister/openembedded,sampov2/audio-openembedded,giobauermeister/openembedded,dellysunnymtech/sakoman-oe,xifengchuo/openembedded,sentient-energy/emsw-oe-mirror,sutajiokousagi/openembedded,buglabs/oe-buglabs,sampov2/audio-openembedded,openembedded/openembedded,dave-billin/overo-ui-moos-auv