Use getters/setters to access ARM branch type

Use getters/setters to access ARM branch type

2016-05-10  Thomas Preud'homme  <thomas.preudhomme@arm.com>

bfd/
	* elf32-arm.c (elf32_arm_size_stubs): Use new macros
	ARM_GET_SYM_BRANCH_TYPE and ARM_SET_SYM_BRANCH_TYPE to respectively get
	and set branch type of a symbol.
	(bfd_elf32_arm_process_before_allocation): Likewise.
	(elf32_arm_relocate_section): Likewise and fix identation along the
	way.
	(allocate_dynrelocs_for_symbol): Likewise.
	(elf32_arm_finish_dynamic_symbol): Likewise.
	(elf32_arm_swap_symbol_in): Likewise.
	(elf32_arm_swap_symbol_out): Likewise.

gas/
	* config/tc-arm.c (arm_adjust_symtab): Use ARM_SET_SYM_BRANCH_TYPE to
	set branch type of a symbol.

gdb/
	* arm-tdep.c (arm_elf_make_msymbol_special): Use
	ARM_GET_SYM_BRANCH_TYPE to get branch type of a symbol.

include/
	* arm.h (enum arm_st_branch_type): Add new ST_BRANCH_ENUM_SIZE
	enumerator.
	(NUM_ENUM_ARM_ST_BRANCH_TYPE_BITS): New macro.
	(ENUM_ARM_ST_BRANCH_TYPE_BITMASK): Likewise.
	(ARM_SYM_BRANCH_TYPE): Replace by ...
	(ARM_GET_SYM_BRANCH_TYPE): This and ...
	(ARM_SET_SYM_BRANCH_TYPE): This in two versions depending on whether
	BFD_ASSERT is defined or not.

ld/
	* emultempl/armelf.em (gld${EMULATION_NAME}_finish): Use
	ARM_GET_SYM_BRANCH_TYPE to get branch type of a symbol.

opcodes/
	* arm-dis.c (get_sym_code_type): Use ARM_GET_SYM_BRANCH_TYPE to get
	branch type of a symbol.
	(print_insn): Likewise.