now that MCSymbol::print doesn't use it's MAI argument, we can

now that MCSymbol::print doesn't use it's MAI argument, we can
remove it and change all the code that prints MCSymbols to use
<< instead, which is much simpler and cleaner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93695 91177308-0d34-0410-b5e6-96231b3b80d8