aarch64: disable tests on ilp32 [PR94514]

branch-protection=pac-ret is only supported with lp64 abi.

gcc/testsuite/ChangeLog:

	PR target/94514
	* g++.target/aarch64/pr94514.C: Require lp64.
	* gcc.target/aarch64/pr94514.c: Likewise.

gcc/testsuite/ChangeLog

+2020-04-23  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	PR target/94514
+	* g++.target/aarch64/pr94514.C: Require lp64.
+	* gcc.target/aarch64/pr94514.c: Likewise.
+
 2020-04-23  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/94707

gcc/testsuite/g++.target/aarch64/pr94514.C

 /* PR target/94514. Unwind across mixed pac-ret and non-pac-ret frames.  */
 /* { dg-do run } */
+/* { dg-require-effective-target lp64 } */
 
 __attribute__((noinline, target("branch-protection=pac-ret")))
 static void do_throw (void)

gcc/testsuite/gcc.target/aarch64/pr94514.c

 /* PR target/94514. Unwind across mixed pac-ret and non-pac-ret frames.  */
 /* { dg-do run } */
+/* { dg-require-effective-target lp64 } */
 /* { dg-options "-fexceptions -O2" } */
 
 #include <unwind.h>