https://llvm.org/docs/PDB/DbiStream.html#stream-header
pub const DbiStreamHeader = extern struct
pub const DbiStreamHeader = extern struct {
version_signature: i32,
version_header: u32,
age: u32,
global_stream_index: u16,
build_number: u16,
public_stream_index: u16,
pdb_dll_version: u16,
sym_record_stream: u16,
pdb_dll_rbld: u16,
mod_info_size: u32,
section_contribution_size: u32,
section_map_size: u32,
source_info_size: i32,
type_server_size: i32,
mfc_type_server_index: u32,
optional_dbg_header_size: i32,
ec_substream_size: i32,
flags: u16,
machine: u16,
padding: u32,
}