testsuite: skip PR103350 tests on big-endian

These tests are reduced from a C program and use gcc vector extensions and so
aren't endianness agnostic. As such skip them on BE.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/pr103350-1.c: Skip on BE.
	* gcc.target/aarch64/pr103350-2.c: Likewise.

gcc/testsuite/gcc.target/aarch64/pr103350-1.c

@@ -1,4 +1,4 @@
-/* { dg-do run } */
+/* { dg-do run { target le } } */
 /* { dg-additional-options "-Os -fno-tree-ter -save-temps -fdump-rtl-ree-all -free -std=c99 -w" } */
 
 typedef unsigned char u8;

gcc/testsuite/gcc.target/aarch64/pr103350-2.c

@@ -1,4 +1,4 @@
-/* { dg-do run } */
+/* { dg-do run { target le } } */
 /* { dg-additional-options "-O2 -save-temps -fdump-rtl-ree-all -free -std=c99 -w" } */
 
 typedef unsigned char __attribute__((__vector_size__ (8))) v64u8;