[dsymutil] Set LSan blacklist whenever sanitizers are enabled.
[dsymutil] Set LSan blacklist whenever sanitizers are enabled.

LSan can be enabled by itself or as part of the address sanitizer.
Rather than checking the enabled sanitizers for both, just set the LSan
env options whenever a sanitizer is enabled.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@342881 91177308-0d34-0410-b5e6-96231b3b80d8

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