i386: TEST insn should be merged with ADC/SBB insn [PR122390]

i386: TEST insn should be merged with ADC/SBB insn [PR122390]

The attached testcase is currently compiled to:

f1:
        cmpl    %esi, %edi
        adcl    %esi, %edi
        testl   %edi, %edi
        js      .L4
	...

TEST insn should be merged with ADC/SBB insn.  The patch provides missing
combined insn patterns.

	PR target/122390

gcc/ChangeLog:

	* config/i386/i386.md (*add<mode>3_carry_2): New insn pattern.
	(*add<mode>3_carry_0_cc): Ditto.
	(*add<mode>3_carry_0r_cc): Ditto.
	(*sub<mode>3_carry_2): Ditto.
	(*sub<mode>3_carry_0_cc): Ditto.
	(*sub<mode>3_carry_0r_cc): Ditt.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr122390.c: New test.
	* gcc.target/i386/pr122390-1.c: New test.