unix: fix AF_CAN tests for big endian systems

see discussion in https://go-review.googlesource.com/c/sys/+/248977

Change-Id: I25dff34d2a6587d0b02836d7e2c9c40e08378731
GitHub-Last-Rev: 33cf644
GitHub-Pull-Request: #81
Reviewed-on: https://go-review.googlesource.com/c/sys/+/249743
Run-TryBot: Tobias Klauser <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Tobias Klauser <[email protected]>
Reviewed-by: Matt Layher <[email protected]>

Author: skladd

unix/syscall_internal_linux_test.go

@@ -174,16 +174,16 @@ func Test_anyToSockaddr(t *testing.T) {
 				Family:  AF_CAN,
 				Ifindex: 12345678,
 				Addr: [16]byte{
-					0x89, 0x67, 0x45, 0x23,
-					0x90, 0x78, 0x56, 0x34,
+					0xAA, 0xAA, 0xAA, 0xAA,
+					0xBB, 0xBB, 0xBB, 0xBB,
 					0x0, 0x0, 0x0, 0x0,
 					0x0, 0x0, 0x0, 0x0,
 				},
 			}),
 			sa: &SockaddrCAN{
 				Ifindex: 12345678,
-				RxID:    0x23456789,
-				TxID:    0x34567890,
+				RxID:    0xAAAAAAAA,
+				TxID:    0xBBBBBBBB,
 			},
 		},
 		{
@@ -573,15 +573,15 @@ func TestSockaddrCAN_sockaddr(t *testing.T) {
 			name: "with ids",
 			sa: &SockaddrCAN{
 				Ifindex: 12345678,
-				RxID:    0x23456789,
-				TxID:    0x34567890,
+				RxID:    0xAAAAAAAA,
+				TxID:    0xBBBBBBBB,
 			},
 			raw: &RawSockaddrCAN{
 				Family:  AF_CAN,
 				Ifindex: 12345678,
 				Addr: [16]byte{
-					0x89, 0x67, 0x45, 0x23,
-					0x90, 0x78, 0x56, 0x34,
+					0xAA, 0xAA, 0xAA, 0xAA,
+					0xBB, 0xBB, 0xBB, 0xBB,
 					0x0, 0x0, 0x0, 0x0,
 					0x0, 0x0, 0x0, 0x0,
 				},