objdump: set address of debug sections.

This patche fixes the values of FDE pc in output of objdump -Wf. They now
match readelf ones.

binutils/
	* objdump.c (load_specific_debug_section): Set address of section.
Return zero in can_single_step_to_signal_handler for nios2-*-* target

nios2 uses software single step, so GDB is unable to single step to
the signal handler.  In order to reflect this, teach
can_single_step_to_signal_handler to return zero for nios2 target.

gdb/testsuite:

2014-03-27  Yao Qi  <yao@codesourcery.com>

	* lib/gdb.exp (can_single_step_to_signal_handler): Return zero
	if target is nios2-*-*.
Mach-O: add objdump -P function_starts to display function starts.

bfd/
	* mach-o.h (bfd_mach_o_get_base_address): New prototype.
	* mach-o.c (bfd_mach_o_write_symtab)
	(bfd_mach_o_write_contents)
	(bfd_mach_o_set_section_flags_from_bfd)
	(bfd_mach_o_build_seg_command): Fix indentation.
	(bfd_mach_o_get_base_address): New function.

binutils/
	* od-macho.c (OPT_FUNCTION_STARTS): New macro.
	(options): Add entry for function_starts.
	(mach_o_help): Ditto.
	(disp_segment_prot): New function.
	(dump_section_map): Call disp_segment_prot.
	(dump_function_starts): New function.
	(dump_obj_compact_unwind): Fix ouput indentation.
	(dump_exe_compact_unwind): Fix ouput indentation.
	(mach_o_dump): Handle function_starts.
This fixes a compile time error triggered by -Werror=format-security because
a call to sprintf was being made with a non-constant formatting string.

	* config/tc-score.c (s3_parse_pce_inst): Add "%s" parameter to
	sprintf in order to avoid a compile time warning.
Mach-O: disp dyld environment command in objdump -P load.

bfd/
	* mach-o.c (bfd_mach_o_read_dylinker): Remove assert.
	(bfd_mach_o_read_command): Handle BFD_MACH_O_LC_DYLD_ENVIRONMENT.
binutils/
	* od-macho.c (dump_load_command): Display value for
	BFD_MACH_O_LC_DYLD_ENVIRONMENT.  Handle BFD_MACH_O_LC_DATA_IN_CODE
	and BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS.