[ARC] Add JLI support.

[ARC] Add JLI support.

The following relocation types were added to GCC/binutils:

ARC_JLI_SECTOFF is a relocation type in Metaware that is now used by
GCC as well to adjust the index of function calls to functions with
attribute jli_call_always.

bfd/
2017-07-19  Claudiu Zissulescu  <claziss@synopsys.com>
	    John Eric Martin  <John.Martin@emmicro-us.com>

	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.
	* elf32-arc.c (JLI): Define.
	* reloc.c: Add JLI relocations.

gas/
2017-07-19  Claudiu Zissulescu  <claziss@synopsys.com>

	* testsuite/gas/arc/jli-1.d: New file.
	* testsuite/gas/arc/jli-1.s: Likewise.
	* testsuite/gas/arc/taux.d: Update for jli_base.

include/
2017-07-19  Claudiu Zissulescu  <claziss@synopsys.com>
	    John Eric Martin  <John.Martin@emmicro-us.com>

	* elf/arc-reloc.def: Add JLI relocs howto.
	* opcode/arc-func.h (replace_jli): New function.

ld/
2017-07-19  Claudiu Zissulescu  <claziss@synopsys.com>
	    John Eric Martin  <John.Martin@emmicro-us.com>

	* emulparams/arcelf.sh (JLI_START_TABLE): Define.
	* scripttempl/elfarc.sc: Handle jlitab section.
	* scripttempl/elfarcv2.sc: Likewise.
	* testsuite/ld-arc/arc.exp: Add JLI test.
	* testsuite/ld-arc/jli-script.ld: New file.
	* testsuite/ld-arc/jli-simple.dd: Likewise.
	* testsuite/ld-arc/jli-simple.rd: Likewise.
	* testsuite/ld-arc/jli-simple.s: Likewise.
	* testsuite/ld/testsuite/ld-arc/jli-overflow.s: Likewise.
	* testsuite/ld/testsuite/ld-arc/jli-overflow.d: Likewise.
	* testsuite/ld/testsuite/ld-arc/jli-overflow.err: Likewise.

opcode/
2017-07-19  Claudiu Zissulescu  <claziss@synopsys.com>
	    John Eric Martin  <John.Martin@emmicro-us.com>

	* arc-opc.c (UIMM10_6_S_JLIOFF): Define.
	(UIMM3_23): Adjust accordingly.
	* arc-regs.h: Add/correct jli_base register.
	* arc-tbl.h (jli_s): Likewise.