[ARC] Improve printing of pc-relative instructions.

[ARC] Improve printing of pc-relative instructions.

opcodes/
2017-11-21  Claudiu Zissulescu <claziss@synopsys.com>

	* arc-dis.c (print_insn_arc): Pretty print pc-relative offsets.
	* arc-opc.c (SIMM21_A16_5): Make it pc-relative.

gas/
2017-11-21  Claudiu Zissulescu <claziss@synopsys.com>

	* testsuite/gas/arc/b.d : Update test.
	* testsuite/gas/arc/bl.d: Likewise.
	* testsuite/gas/arc/jli-1.d: Likewise.
	* testsuite/gas/arc/lp.d: Likewise.
	* testsuite/gas/arc/pcl-relocs.d: Likewise.
	* testsuite/gas/arc/pcrel-relocs.d: Likewise.
	* testsuite/gas/arc/pic-relocs.d: Likewise.
	* testsuite/gas/arc/plt-relocs.d: Likewise.
	* testsuite/gas/arc/pseudos.d: Likewise.
	* testsuite/gas/arc/relax-avoid2.d: Likewise.
	* testsuite/gas/arc/relax-avoid3.d: Likewise.
	* testsuite/gas/arc/relax-b.d: Likewise.
	* testsuite/gas/arc/tls-relocs.d: Likewise.
	* testsuite/gas/arc/relax-add01.d: Likewise.
	* testsuite/gas/arc/relax-add04.d: Likewise.
	* testsuite/gas/arc/relax-ld01.d: Likewise.
	* testsuite/gas/arc/relax-sub01.d: Likewise.
	* testsuite/gas/arc/relax-sub02.d: Likewise.
	* testsuite/gas/arc/relax-sub04.d: Likewise.
	* testsuite/gas/arc/pcl-print.s: New file.
	* testsuite/gas/arc/pcl-print.d: Likewise.
	* testsuite/gas/arc/nps400-12.d: Likewise.

ld/
2017-11-21  Claudiu Zissulescu <claziss@synopsys.com>

	* testsuite/ld-arc/jli-simple.d: Update test.