[GAS][AARCH64]Add BFD_RELOC_AARCH64_TLSGD_MOVW_G1 support.

[GAS][AARCH64]Add BFD_RELOC_AARCH64_TLSGD_MOVW_G1 support.

bfd/

2015-10-02  Renlin Li <renlin.li@arm.com>

	* reloc.c (BFD_RELOC_AARCH64_TLSGD_MOVW_G1): New entry.
	* elfnn-aarch64.c (elfNN_aarch64_howto_table): New entry for
	BFD_RELOC_AARCH64_TLSGD_MOVW_G1.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Likewise.

gas/

2015-10-02  Renlin Li <renlin.li@arm.com>

	* config/tc-aarch64.c (reloc_table): New relocation modifier tlsgd_g1.
	(process_movw_reloc_info): Support BFD_RELOC_AARCH64_TLSGD_MOVW_G1.
	(md_apply_fix): Likewise.
	(aarch64_force_relocation): Likewise.

gas/testsuite/

2015-10-02  Renlin Li <renlin.li@arm.com>

	* gas/aarch64/reloc-tlsgd_g1.s: New.
	* gas/aarch64/reloc-tlsgd_g1.s: New.