[BOLT] Handle R_X86_64_converted_reloc_bit

Summary:
In binutils 2.30 a bfd linker accidentally started modifying some
relocations on output under `-q/--emit-relocs` by turning on
R_X86_64_converted_reloc_bit. As a result, BOLT ignored such
relocations and failed to correctly update the binary.

This diff filters out R_X86_64_converted_reloc_bit from the relocation
type.

(cherry picked from FBD14907832)