[binutils-gdb] Don't generate PLT relocations for now binding

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT 25070364b0ce33eed46aa5d78ebebbec6accec7e ***

Author: H.J. Lu <hjl.tools@gmail.com>
Branch: master
Commit: 25070364b0ce33eed46aa5d78ebebbec6accec7e

Don't generate PLT relocations for now binding
There is no need for PLT relocations with -z now. We can use GOT
relocations, which take less space, instead and replace 16-byte .plt
entres with 8-byte .plt.got entries.

bfd/

	* elf32-i386.c (elf_i386_check_relocs): Create .plt.got section
	for now binding.
	(elf_i386_allocate_dynrelocs): Use .plt.got section for now
	binding.
	* elf64-x86-64.c (elf_x86_64_check_relocs): Create .plt.got
	section for now binding.
	(elf_x86_64_allocate_dynrelocs): Use .plt.got section for now
	binding.

ld/testsuite/

	* ld-i386/i386.exp: Run PR ld/17689 tests with -z now.
	* ld-x86-64/x86-64.exp: Likewise
	* ld-i386/pr17689now.rd: New file.
	* ld-x86-64/pr17689now.rd: Likewise