linux: update linux_git placeholder to 2.6.39-rc1
linux: update linux_git placeholder to 2.6.39-rc1

Signed-off-by: Andrea Adami <58a22b0beb8ec13ae546a060c8b4c576f22f6153@gmail.com>

openembedded/openembedded,sentient-energy/emsw-oe-mirror,xifengchuo/openembedded,openembedded/openembedded,xifengchuo/openembedded,openembedded/openembedded,openembedded/openembedded,sentient-energy/emsw-oe-mirror,giobauermeister/openembedded,xifengchuo/openembedded,sentient-energy/emsw-oe-mirror,giobauermeister/openembedded,openembedded/openembedded,openembedded/openembedded,dellysunnymtech/sakoman-oe,JamesAng/goe,giobauermeister/openembedded,hulifox008/openembedded,giobauermeister/openembedded,giobauermeister/openembedded,JamesAng/oe,JamesAng/goe,openembedded/openembedded,JamesAng/oe,JamesAng/goe,JamesAng/goe,JamesAng/goe,dellysunnymtech/sakoman-oe,JamesAng/oe,giobauermeister/openembedded,giobauermeister/openembedded,hulifox008/openembedded,JamesAng/oe,JamesAng/oe,giobauermeister/openembedded,sentient-energy/emsw-oe-mirror,openembedded/openembedded,hulifox008/openembedded,JamesAng/oe,hulifox008/openembedded,dellysunnymtech/sakoman-oe,dellysunnymtech/sakoman-oe,dellysunnymtech/sakoman-oe,xifengchuo/openembedded,hulifox008/openembedded,openembedded/openembedded,dellysunnymtech/sakoman-oe,JamesAng/oe,JamesAng/goe,giobauermeister/openembedded,dellysunnymtech/sakoman-oe,dellysunnymtech/sakoman-oe,openembedded/openembedded,xifengchuo/openembedded,sentient-energy/emsw-oe-mirror,xifengchuo/openembedded,xifengchuo/openembedded,hulifox008/openembedded,xifengchuo/openembedded,JamesAng/goe,sentient-energy/emsw-oe-mirror,xifengchuo/openembedded,dellysunnymtech/sakoman-oe,hulifox008/openembedded,openembedded/openembedded,sentient-energy/emsw-oe-mirror