[4.8-rc1] make bindeb-pkg O= fails

[frank paulsen]

in 4.8-rc1 "make bindeb-pkg O=../debian" fails:
| find: `scripts/gcc-plugins': No such file or directory
| /usr/src/linus/scripts/package/Makefile:97: recipe for target
'bindeb-pkg' failed

this is due to a missing directory scripts/gcc-plugins if using O=

removing line 335 of scripts/package/builddeb helps:
| (cd $objtree; find scripts/gcc-plugins -name \*.so -o -name
gcc-common.h) >> "$objtree/debian/hdrobjfiles"

this clearly isn't the right fix, but i checked it anyway and the
paket gets built.