aarch64: Rename bic/orn patterns to iorn/andn for vector modes

aarch64: Rename bic/orn patterns to iorn/andn for vector modes

This renames the patterns orn<mode>3 to iorn<mode>3 so it
matches the new optab that was added with r15-1890-gf379596e0ba99d.
Likewise for bic<mode>3 to andn<mode>3.

Note the operand 1 and operand 2 are swapped from the original
patterns to match the optab now.

Built and tested for aarch64-linux-gnu with no regression.

gcc/ChangeLog:

	* config/aarch64/aarch64-simd.md
	(bic<mode>3<vczle><vczbe>): Rename to ...
	(andn<mode>3<vczle><vczbe>): This. Also swap operands.
	(orn<mode>3<vczle><vczbe>): Rename to ...
	(iorn<mode>3<vczle><vczbe>): This. Also swap operands.
	(vec_cmp<mode><v_int_equiv>): Update orn call to iorn
	and swap the last two arguments.

gcc/testsuite/ChangeLog:

	* g++.target/aarch64/vect_cmp-1.C: New test.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>