[test-release.sh] Enable Polly by default
[test-release.sh] Enable Polly by default

Reviewers: grosser, hans, zinob, bollu

Reviewed By: grosser, hans

Subscribers: tstellar, llvm-commits

Differential Revision: https://reviews.llvm.org/D34306

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@305763 91177308-0d34-0410-b5e6-96231b3b80d8

GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm