MFC r340075: readelf: decode R_MIPS_HIGHER and R_MIPS_HIGHEST relocation types

Sponsored by: The FreeBSD Foundation

MFC r311946: readelf: add S390 relocation types

From https://refspecs.linuxfoundation.org/ELF/zSeries/lzsabi0_zSeries.html

readelf: add PPC64 relocation types

MFC of r311941, r311942

MFC r305130: Update to ELF Tool Chain r3490

Improvements include:
* readelf: report all relocation types in rel/rela for MIPS N64
* readelf: add ELFOSABI_ARM_AEABI
* elfdump: add ELFOSABI_ARM_AEABI and ELFOSABI_ARM
* Add recent RISC-V relocations
* elfcopy: use elftc_timestamp, to support SOURCE_DATE_EPOCH

MFC r305155: readelf: silence GCC 4.2.1 uninitialized variable warning

Sponsored by: The FreeBSD Foundation

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Use the in-tree sys/elf_common.h to build libelftc.

This fixes build failures on older releases that lack various
definitions such as EM_AARCH64 (which was unfixed before this).

Revert all of the recent compatibility changes that worked around this
problem.

This uses the same method of using the in-tree header as lib/libelf,
lib/libdwarf and usr.bin/readelf.

Reviewed by: emaste
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D6734

elftoolchain: backwards compatability for EM_RISCV definition

It is not provided by sys/elf_common.h on older releases

Reported by: Jenkins

elftoolchain: backwards compatability for EM_IAMCU definition

It is not provided by sys/elf_common.h on older stable/10.

Update to ELF Tool Chain r3475

Improvements include:

* Add support for reporting and handling a number of new constants in
various tools, including:
* CloudABI OSABI
* DT_TLSDESC_*
* i386, MIPS, SPARC and amd64 relocations

* C++ demangler bug fixes

* Man page updates

* Improved input validation in several tools

This update also reduces diffs against upstream as a number of fixes
included in upstream were previously cherry-picked into FreeBSD.

Sponsored by: The FreeBSD Foundation

Import ELF Tool Chain snapshot at revision 3475

From http://svn.code.sf.net/p/elftoolchain/code/