Test failures on s390x

[davide125]

See https://koji.fedoraproject.org/koji/taskinfo?taskID=83646116 for the full log

github.com/facebook/time/timestamp
--- FAIL: TestReadPacketWithRXTimestamp (0.00s)
    timestamp_linux_test.go:212: 
        	Error Trace:	timestamp_linux_test.go:212
        	Error:      	Not equal: 
        	            	expected: 164641548
        	            	actual  : 910124969297792771
        	Test:       	TestReadPacketWithRXTimestamp
        	Messages:   	kernel timestamps should be within 10s
--- FAIL: TestReadPacketWithRXTXTimestamp (0.00s)
    timestamp_linux_test.go:247: 
        	Error Trace:	timestamp_linux_test.go:247
        	Error:      	Not equal: 
        	            	expected: 164641548
        	            	actual  : 910124970574170190
        	Test:       	TestReadPacketWithRXTXTimestamp
        	Messages:   	kernel timestamps should be within 10s
FAIL
exit status 1
FAIL	github.com/facebook/time/timestamp	0.117s