Driver: Add support for -march=bdver3 on x86.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193985 91177308-0d34-0410-b5e6-96231b3b80d8
Make ADLResult::iterator a proper iterator.

PR17796.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193986 91177308-0d34-0410-b5e6-96231b3b80d8