mtd-utils.inc: flexible handling of ${mtd_utils} in do_stage and do_install
mtd-utils.inc: flexible handling of ${mtd_utils} in do_stage and do_install

 * the include file relies on a given list of utils to be installed, but the list is not correct for all versions which include it
 * this revision adds a check for the existence of these files before trying to install/stage them

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