[ms] [llvm-ml] Create the @feat.00 symbol, and populate it appropriately @feat.00 is a bitfield read by Microsoft-style linkers, and is required to signal (e.g.) /safeseh support on 32-bit systems. Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D88451 GitOrigin-RevId: 13f701b99ca1e0786258ef05b0439d4893aac8cb