x86: Pass --gdwarf-3 to assembler

Pass --gdwarf-3 to assembler for

commit 4d8ee860
Author: Nick Clifton <nickc@redhat.com>
Date:   Thu Jul 30 08:39:14 2020 +0100

    Prevent the generation of DWARF level 0 line number tables...

binutils/

	* testsuite/binutils-all/i386/compressed-1a.d: Pass --gdwarf-3
	to assembler.
	* testsuite/binutils-all/i386/compressed-1b.d: Likewise.
	* testsuite/binutils-all/i386/compressed-1c.d: Likewise.
	* testsuite/binutils-all/x86-64/compressed-1a.d: Likewise.
	* testsuite/binutils-all/x86-64/compressed-1b.d: Likewise.
	* testsuite/binutils-all/x86-64/compressed-1c.d: Likewise.

gas/

	* testsuite/gas/elf/dwarf2-3.d:Pass --gdwarf-3 to assembler.
	* testsuite/gas/elf/dwarf2-5.d: Likewise.
	* testsuite/gas/i386/dw2-compress-3a.d: Likewise.
	* testsuite/gas/i386/dw2-compress-3b.d: Likewise.
	* testsuite/gas/i386/dw2-compressed-3a.d: Likewise.
	* testsuite/gas/i386/dw2-compressed-3b.d: Likewise.