gcc-package-target.inc: Switch to TARGET_PREFIX in symlinks
gcc-package-target.inc: Switch to TARGET_PREFIX in symlinks

When TARGET_PREFIX and TARGET_SYS didn't match up, the symlinks we made
were invalid.  TARGET_PREFIX is what we use when configuring so it's what we
should be using here.

Signed-off-by: Tom Rini <4c3d5c8f8c21c27dd329bd585f481113514551fd@mentor.com>

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