Block SIGPIPE around virExec hook functions
Block SIGPIPE around virExec hook functions

Some functionality run in virExec hooks may do I/O which
can trigger SIGPIPE. Renable SIGPIPE blocking around the
hook function

* src/util/util.c: Block SIGPIPE around hooks

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