[dsymutil] Fix typo in comment.

Next time, when I fix a typo, I'll take the time to reread the whole
comment instead of waiting for the commit email to realize that there
is another one two words later...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232234 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed