[dsymutil] Don't overload LinkOptions.
[dsymutil] Don't overload LinkOptions.

This should fix the build bots:

  error: declaration of ‘llvm::dsymutil::LinkOptions
  DsymutilOptions::LinkOptions’ [-fpermissive]

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@373640 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 78a388a985b468dde9509368b5a9528d4ce4f01c)

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm