[SCEV][NFC] Fix a misleading description of AddOpsInlineThreshold
[SCEV][NFC] Fix a misleading description of AddOpsInlineThreshold

The description of this option was copy-pasted from another one and does not
correspond to reality.

Differential Revision: https://reviews.llvm.org/D34390


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@305782 91177308-0d34-0410-b5e6-96231b3b80d8

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