polyjit: cleanup base-flags to match newest polli
polyjit: cleanup base-flags to match newest polli

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Former-commit-id: a80a8b3d048e2302518bbceecf2c6094c848956f [formerly eac0a8521b6f8cf87d40ac579debf9710fe75bf9] [formerly b9a178a0fe4bfaaca2f9f30d736c612af47e683e [formerly 9810fe84385fec60888bfad46002bf1b8aa18585]]
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Former-commit-id: 384902bf321d271f5b86755d5963cc90d62a8f90
PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild