LTO codegen can add symbol references resolved by object files with
.deplibs sections. These object files will be added to the link by
symbol resolution, but parseFile() will never be called on the object
file, so the .deplibs will never be resolved. This can lead to undefined
This change adds a second round of parseFile() calls to handle any input
files added to the link after LTO codegen. This resolves the .deplibs
sections mentioned above, as well as any further input files this adds
to the link.