aarch64: Prevent moving throwing accesses in ldp/stp pass [PR113093]

aarch64: Prevent moving throwing accesses in ldp/stp pass [PR113093]

As the PR shows, there was nothing to prevent the ldp/stp pass from
trying to move throwing insns, which lead to an RTL verification
failure.

This patch fixes that.

gcc/ChangeLog:

	PR target/113093
	* config/aarch64/aarch64-ldp-fusion.cc (latest_hazard_before):
	If the insn is throwing, record the previous insn as a hazard to
	prevent moving it from the end of the BB.

gcc/testsuite/ChangeLog:

	PR target/113093
	* gcc.dg/pr113093.c: New test.