aarch64/testsuite: Fix if-compare_2.c for removing vcond{,u,eq} patterns [PR116041]

aarch64/testsuite: Fix if-compare_2.c for removing vcond{,u,eq} patterns [PR116041]

For bar1 and bar2, we currently is expecting to use the bsl instruction but
with slightly different register allocation inside the loop (which happens after
the removal of the vcond{,u,eq} patterns), we get the bit instruction.  The pattern that
outputs bsl instruction will output bit and bif too depending register allocation.

So let's check for bsl, bit or bif instructions instead of just bsl instruction.

Tested on aarch64 both with an unmodified compiler and one which has the patch to disable
these optabs.

gcc/testsuite/ChangeLog:

	PR testsuite/116041
	* gcc.target/aarch64/if-compare_2.c: Support bit and bif for
	both bar1 and bar2; add comment on why too.

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