build: Fix protocol-structs check in VPATH build
build: Fix protocol-structs check in VPATH build

$@ already included $(srcdir)

VenkatDatta/libvirt,eskultety/libvirt,emaste/libvirt,andreabolognani/libvirt,cbosdo/libvirt,novel/fbsd-libvirt,novel/fbsd-libvirt,agx/libvirt,emaste/libvirt,iam-TJ/libvirt,rmarwaha/libvirt,usc-isi/libvirt,cbosdo/libvirt,zhlcindy/libvirt-1.1.4-maintain,warewolf/libvirt,wiedi/libvirt,trainstack/libvirt,trainstack/libvirt,VenkatDatta/libvirt,bjzhang/libvirt,jfehlig/libvirt,kantai/libvirt-vfork,zippy2/libvirt,rmarwaha/libvirt1,shugaoye/libvirt,soulxu/libvirt-xuhj,libvirt/libvirt,soulxu/libvirt-xuhj,agx/libvirt,nertpinx/libvirt,leilihh/libvirt,nertpinx/libvirt,olafhering/libvirt,olafhering/libvirt,fabianfreyer/libvirt,wiedi/libvirt,siboulet/libvirt-openvz,kantai/libvirt-vfork,trainstack/libvirt,rlaager/libvirt,datto/libvirt,zippy2/libvirt,foomango/libvirt,libvirt/libvirt,zippy2/libvirt,jeckersb/libvirt,siboulet/libvirt-openvz,crobinso/libvirt,eskultety/libvirt,datto/libvirt,rlaager/libvirt,danwent/libvirt-ovs,novel/fbsd-libvirt,kantai/libvirt-vfork,cbosdo/libvirt,taget/libvirt,cbosdo/libvirt,danwent/libvirt-ovs,fabianfreyer/libvirt,jeckersb/libvirt,crobinso/libvirt,wiedi/libvirt,libvirt/libvirt,rmarwaha/libvirt,danwent/libvirt-ovs,nertpinx/libvirt,agx/libvirt,rlaager/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,eskultety/libvirt,rmarwaha/libvirt1,warewolf/libvirt,taget/libvirt,taget/libvirt,usc-isi/libvirt,jardasgit/libvirt,warewolf/libvirt,zippy2/libvirt,leilihh/libvirt,rmarwaha/libvirt,jfehlig/libvirt,andreabolognani/libvirt,crobinso/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,andreabolognani/libvirt,bjzhang/libvirt,dumbbell/libvirt,jeckersb/libvirt,leilihh/libvirt,dumbbell/libvirt,trainstack/libvirt,shugaoye/libvirt,dumbbell/libvirt,warewolf/libvirt,rlaager/libvirt,novel/fbsd-libvirt,usc-isi/libvirt,bjzhang/libvirt,emaste/libvirt,usc-isi/libvirt,novel/fbsd-libvirt,dumbbell/libvirt,kantai/libvirt-vfork,libvirt/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,datto/libvirt,shugaoye/libvirt,warewolf/libvirt,jeckersb/libvirt,jardasgit/libvirt,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,soulxu/libvirt-xuhj,soulxu/libvirt-xuhj,wiedi/libvirt,fabianfreyer/libvirt,datto/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,shugaoye/libvirt,elmarco/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,leilihh/libvirt,bjzhang/libvirt,jardasgit/libvirt,agx/libvirt,novel/fbsd-libvirt,fabianfreyer/libvirt,cbosdo/libvirt,VenkatDatta/libvirt,taget/libvirt,novel/fbsd-libvirt,foomango/libvirt,jeckersb/libvirt,iam-TJ/libvirt,bjzhang/libvirt,VenkatDatta/libvirt,olafhering/libvirt,kantai/libvirt-vfork,leilihh/libvirt,agx/libvirt,foomango/libvirt,elmarco/libvirt,emaste/libvirt,zhlcindy/libvirt-1.1.4-maintain,rmarwaha/libvirt1,foomango/libvirt,wiedi/libvirt,rmarwaha/libvirt1,emaste/libvirt,nertpinx/libvirt,wiedi/libvirt,iam-TJ/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt,crobinso/libvirt,andreabolognani/libvirt,usc-isi/libvirt,siboulet/libvirt-openvz,soulxu/libvirt-xuhj,trainstack/libvirt,dumbbell/libvirt,novel/fbsd-libvirt,wiedi/libvirt,olafhering/libvirt,siboulet/libvirt-openvz,rmarwaha/libvirt1,danwent/libvirt-ovs,elmarco/libvirt,shugaoye/libvirt,jfehlig/libvirt,jardasgit/libvirt,elmarco/libvirt,nertpinx/libvirt,eskultety/libvirt,eskultety/libvirt,warewolf/libvirt,novel/fbsd-libvirt,emaste/libvirt,jeckersb/libvirt,iam-TJ/libvirt,rmarwaha/libvirt1,rmarwaha/libvirt,andreabolognani/libvirt,emaste/libvirt,trainstack/libvirt,jardasgit/libvirt,dumbbell/libvirt,datto/libvirt,leilihh/libvirt,warewolf/libvirt,taget/libvirt,jeckersb/libvirt,foomango/libvirt,elmarco/libvirt,rmarwaha/libvirt