gitver: add GITSHA variable
gitver: add GITSHA variable

There's a case where git describe produces output which is not pleasant, to
put it mildly, and it's better to just set PV to "0.0+${GITSHA}" or similar,
including the short form of the commit hash for HEAD.

Signed-off-by: Chris Larson <4c8c411260e601995081b113a5ef94a26eff2b25@mentor.com>

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