[dsymutil] Fix add_llvm_tool_symlink

Update the arguments to add_llvm_tool_symlink to symlink llvm-dsymutil
to dsymutil.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327792 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed