KVM: x86 emulator: convert basic ALU ops to fastop

Opcodes:
	TEST
	CMP
	ADD
	ADC
	SUB
	SBB
	XOR
	OR
	AND

Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>