bump verison to 0.5.1
bump verison to 0.5.1


Former-commit-id: 6a2db8f1fea533d87649fe940c5d43411b147d90
Former-commit-id: 46e78dcf1f4b03d967d273fe4946b7aa8b2122bc [formerly ea431585b9e2c221b37b911bd71eab7bb0681b7c] [formerly d1d188296e5e61238b73f81f9ad16b9b28c86899 [formerly 2d04ee8e5cc4b6d163d065b5cc0c582c36d79d55]]
Former-commit-id: 0a0d972fab7d27c389c76a80fd4a30770ebd8e38 [formerly 7735bcbb9ac62b071cc2cbe1f93ab1b2605d3e69]
Former-commit-id: 6b2842cd2e53a95c63369e55788bb3d86b47e0c5
PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild