daily update
Compute the function length instead of hard coding it

In Dwarf::assemble in dwz.exp, 10 is hard-coded in it,

 	    subprogram {
 		{name main}
 		{low_pc main addr}
		{high_pc "main + 10" addr}
 	    }

however, the length of main function varies on architectures.  The
hard-coded 10 here causes dwz.exp fails on some targets, such as
nios2.

This patch is to add some code to compute the length of function main,
which is similar to what we are doing in entry-values.exp.

gdb/testsuite:

2014-04-26  Yao Qi  <yao@codesourcery.com>

	* gdb.dwarf2/dwz.exp: Compile main.c to object.  Restart GDB
	and compute the length of function main.  Save it in
	$main_length.
	(Dwarf::assemble): Use $main_length instead of hard-coded 10.
	(top-level): Use gdb_compile to compile objects into
	executable and restart GDB.  Remove invocation to
	prepare_for_testing.
Regenerate files for openrisk -> or1k change

bfd/
	* po/SRC-POTFILES.in: Regenerate.
	* configure: Regenerate.
gas/
	* po/POTFILES.in: Regenerate.
opcodes/
	* po/POTFILES.in: Regenerate.
* guile/scm-safe-call.c (scscm_eval_scheme_string): Fix comment.
daily update
Make "set disassemble-next-line on" can work with DUMMY_FRAME, SIGTRAMP_FRAME and ARCH_FRAME

When GDB debug DUMMY_FRAME, SIGTRAMP_FRAME and ARCH_FRAME, even if
"set disassemble-next-line on", it will not output the asm code:
(gdb) set disassemble-next-line on
(gdb) si
<signal handler called>
(gdb)
<signal handler called>
(gdb)
<signal handler called>

So make this patch make they can work together, it will become:
(gdb) si
<signal handler called>
=> 0xffffffff816bfb09 <int_with_check+0>:	65 48 8b 0c 25 c8 c7 00 00	mov    %gs:0xc7c8,%rcx
(gdb)
<signal handler called>
=> 0xffffffff816bfb12 <int_with_check+9>:	48 81 e9 d8 1f 00 00	sub    $0x1fd8,%rcx
(gdb)
<signal handler called>
=> 0xffffffff816bfb19 <int_with_check+16>:	8b 51 10	mov    0x10(%rcx),%edx

2014-04-27  Hui Zhu  <hui@codesourcery.com>

	* stack.c (print_frame_info): Call do_gdb_disassembly with
	DUMMY_FRAME, SIGTRAMP_FRAME and ARCH_FRAME.