bfd/

bfd/
	* elf-eh-frame.c (make_pc_relative): New function.
	(_bfd_elf_write_section_eh_frame): Use it.

ld/testsuite/
	* ld-mips-elf/eh-frame1-n32.d: Expect PC-relative encodings
	to include DW_EH_PE_sdata4.
	* ld-mips-elf/eh-frame2-n32.d: Likewise.
	* ld-mips-elf/eh-frame1-n64.d: Expect PC-relative encodings
	to include DW_EH_PE_sdata8.
	* ld-mips-elf/eh-frame2-n64.d: Likewise.