postgres: remove broken benchbuild version, use gentoo version instead
postgres: remove broken benchbuild version, use gentoo version instead

Former-commit-id: 0f1fdb224b85aaaf4164fe3f90a2c5b722c4e8a7
Former-commit-id: b9066986b85e7868ac92e51f1f0f6cd25cdb01c0 [formerly 3ba0a8c1434119a9bcb8d1755dfaf1492bf5233f] [formerly 6f98df3b403cf1a341298d2126cbdf37f360dfa8 [formerly df041c7ecabeb248f8c81be8d0ca193c415e0edb]]
Former-commit-id: 457302b62917f2480e654ffc1c189626f7739670 [formerly 927d88662f4291b1fab5ab433ebd294773598bc7]
Former-commit-id: 19e8bf2ee4c619f4932f349af76ef1a09ba9ef98
PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild