Don't generate .debug_line section if it isn't empty.

Don't generate .debug_line section if it isn't empty.

binutils/testsuite/

2010-07-05  H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/10531
	PR gas/11789
	* binutils-all/objdump.W: Remove bogus line debug info.

gas/

2010-07-05  Jim Wilson  <wilson@codesourcery.com>

	PR gas/10531
	PR gas/11789
	* dwarf2dbg.c (dwarf2_finish): Don't generate .debug_line section
	if it isn't empty.

gas/testsuite/

2010-07-05  H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/10531
	PR gas/11789
	* gas/i386/dw2-compress-1.d: Remove bogus line debug info.

	* gas/elf/dwarf2-1.d: New.
	* gas/elf/dwarf2-1.s: Likewise.
	* gas/elf/dwarf2-2.d: Likewise.
	* gas/elf/dwarf2-2.s: Likewise.
	* gas/elf/dwarf2-3.d: Likewise.
	* gas/elf/dwarf2-3.s: Likewise.
	* gas/i386/debug1.d: Likewise.
	* gas/i386/debug1.s: Likewise.

	* gas/elf/elf.exp: Run dwarf2-1, dwarf2-2 and dwarf2-3.

	* gas/i386/i386.exp: Run debug1 for both 32bit and 64bit.