Rename CodeGenModule::getLLVMLinkageforDeclarator -> getLLVMLinkageForDeclarator

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208808 91177308-0d34-0410-b5e6-96231b3b80d8
Converting some for loops to use range-based for loops. No functional changes intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208810 91177308-0d34-0410-b5e6-96231b3b80d8