[llvm] Add overload of DIBuilder::createArrayType (PR #125229)

[Tom Tromey via llvm-commits]

tromey wrote:

> (if necessary (perhaps it falls out naturally from the implementation already, but I wouldn't assume so) I guess you'll send a separate patch to actually emit this name in llvm/lib/CodeGen/AsmPrinter/Dwarf*?)

This already works because `DwarfUnit::constructTypeDIE(DIE &Buffer, const DICompositeType *CTy)` handles the name generically: https://github.com/llvm/llvm-project/blob/main/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp#L1071-L1073

https://github.com/llvm/llvm-project/pull/125229