tidy x86 HANDLE_ALIGN

tidy x86 HANDLE_ALIGN

Reduce memory requirement for .align in code.

I've changed some of the tests to use "clc" rather than "nop", so that
code emitted by .p2align can be clearly seen.

	* config/tc-i386.c (i386_output_nops): Merge into..
	(i386_generate_nops): ..here.  Put shorter nop first.  For
	rs_align_code make use of the fact that the last fr_var bytes
	are output repeatedly rather than repeating them here.
	* config/tc-i386.h (HANDLE_ALIGN): Don't test max_bytes.
	(MAX_MEM_FOR_RS_ALIGN_CODE): Update.
	* testsuite/gas/i386/nops-1.s,
	* testsuite/gas/i386/nops-2.s,
	* testsuite/gas/i386/nops-3.s,
	* testsuite/gas/i386/nops-4.s,
	* testsuite/gas/i386/nops16-1.s: Replace "nop" with "clc".
	* testsuite/gas/i386/align-branch-6.d,
	* testsuite/gas/i386/nop-1-suffix.d,
	* testsuite/gas/i386/nop-1.d,
	* testsuite/gas/i386/nop-1.l,
	* testsuite/gas/i386/nop-2.d,
	* testsuite/gas/i386/nop-4.d,
	* testsuite/gas/i386/nop-5.d,
	* testsuite/gas/i386/nops-1-core2.d,
	* testsuite/gas/i386/nops-1.d,
	* testsuite/gas/i386/nops-10.d,
	* testsuite/gas/i386/nops-2.d,
	* testsuite/gas/i386/nops-3.d,
	* testsuite/gas/i386/nops-4.d,
	* testsuite/gas/i386/nops-4a-i686.d,
	* testsuite/gas/i386/nops-5.d,
	* testsuite/gas/i386/nops-6.d,
	* testsuite/gas/i386/nops-7.d,
	* testsuite/gas/i386/nops-9.d,
	* testsuite/gas/i386/nops16-1.d,
	* testsuite/gas/i386/x86-64-align-branch-6.d,
	* testsuite/gas/i386/x86-64-nop-1.d,
	* testsuite/gas/i386/x86-64-nop-5.d,
	* testsuite/gas/i386/x86-64-nops-1-core2.d,
	* testsuite/gas/i386/x86-64-nops-1-pentium.d,
	* testsuite/gas/i386/x86-64-nops-1.d,
	* testsuite/gas/i386/x86-64-nops-2.d,
	* testsuite/gas/i386/x86-64-nops-3.d,
	* testsuite/gas/i386/x86-64-nops-4-core2.d,
	* testsuite/gas/i386/x86-64-nops-4.d,
	* testsuite/gas/i386/x86-64-nops-5.d,
	* testsuite/gas/i386/x86-64-nops-6.d,
	* testsuite/gas/i386/x86-64-nops-7.d: Adjust to suit.