Add support to convert missing Elf relocation types
(R_X86_64_PLT32, R_X86_64_GOTPCREL, R_X86_64_REX_GOTPCRELX)
to PeCoff, which are required by LTO image.
These changes are necessary to unbreak sysutils/uefi-edk2-bhyve on
FreeBSD after the update of devel/binutils to version 2.31.1.
Special thanks to bap@FreeBSD.org to help me debug and find a
solution for this issue.
Reported by: many
Obtained from: 86e401fd47
d450d456e4