pie for frv-uclinux, and fix regression in .got dynamic relocations

[Nick Clifton]

Hi Alex,

  (Sorry for the long delay...)


> This patch introduces an entry point in the elf backend data structure
> that enables a BFD to override Jakub's default implementation with
> something that makes sense for the target, and adds such an overrider
> for FRV FDPIC.  It does the right thing now.
> 
> I've also update the fdpic tests with the current results and verified
> that they look reasonable.  They were a mess before :-(
> 
> Ok to install?

Approved - please apply.

Cheers
  Nick
  
> Index: bfd/ChangeLog
> from  Alexandre Oliva  <aoliva@redhat.com>
> 
> 	* elf-bfd.h (struct elf_backend_data): Added
> 	elf_backend_omit_section_dynsym.
> 	(_bfd_elf_link_omit_section_dynsym): Declare.
> 	* elf32-frv.c (_frvfdpic_link_omit_section_dynsym): New.
> 	(elf_backend_omit_section_dynsym): Use it for frvfdpic.
> 	* elflink.c (_bfd_elf_link_omit_section_dynsym): Split out of...
> 	(_bfd_elf_link_renumber_dynsyms): ... this function.
> 	* elfxx-target.h (elf_backend_omit_section_dynsym): Default to
> 	_bfd_elf_link_omit_section_dynsym).
> 	(elfNN_bed): Added elf_backend_omit_section_dynsym.
> 
> Index: ld/ChangeLog
> from  Alexandre Oliva  <aoliva@redhat.com>
> 
> 	* emulparams/elf32frvfd.sh (GENERATE_PIE_SCRIPT): Set to yes.
> 
> Index: ld/testsuite/ChangeLog
> from  Alexandre Oliva  <aoliva@redhat.com>
> 
> 	* ld-frv/fdpic-pie-1.d: Adjust for pie-specific link script.
> 	* ld-frv/fdpic-pie-2.d: Likewise.
> 	* ld-frv/fdpic-pie-6.d: Likewise.
> 	* ld-frv/fdpic-pie-7.d: Likewise.
> 	* ld-frv/fdpic-pie-8.d: Likewise.
> 	* ld-frv/fdpic-shared-1.d: Likewise.
> 	* ld-frv/fdpic-shared-2.d: Likewise.
> 	* ld-frv/fdpic-shared-3.d: Likewise.
> 	* ld-frv/fdpic-shared-4.d: Likewise.
> 	* ld-frv/fdpic-shared-5.d: Likewise.
> 	* ld-frv/fdpic-shared-6.d: Likewise.
> 	* ld-frv/fdpic-shared-7.d: Likewise.
> 	* ld-frv/fdpic-shared-8.d: Likewise.
> 	* ld-frv/fdpic-shared-local-2.d: Likewise.
> 	* ld-frv/fdpic-shared-local-8.d: Likewise.