added perf branch to travis
added perf branch to travis


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Former-commit-id: 8e1139e3e4b161703b9f0904364cb2249dd7286d [formerly 813dc71d76d35cdae96b5cc07e86b82e29ee9d1f] [formerly cb0b2b71842c48d7afb2e00a3a5686ee0638f025 [formerly 71ccdf5afc6cde716b549373e5933a6a32e49327]]
Former-commit-id: e818800a5b2d882111dee0c1d4f5d8e1d9551d4d [formerly d9c013c8df225b5f38d39660a3865a878b0a22e0]
Former-commit-id: 230308aa9d7705591bda43e7ca3192b922aa9c8a
PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild,PolyJIT/benchbuild