crypto/internal/cryptotest: skip TestAllocations on s390x

TestXAESAllocations fails like #70448, and crypto/rand's fails in FIPS
mode. We can't keep chasing these without even a LUCI builder.

Updates #67307

Change-Id: I5d0edddf470180a321dec55cabfb018db62eb940
Reviewed-on: https://go-review.googlesource.com/c/go/+/636055
Auto-Submit: Filippo Valsorda <[email protected]>
Reviewed-by: Roland Shoemaker <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>

Author: FiloSottile

src/crypto/internal/cryptotest/allocations.go

@@ -32,6 +32,12 @@ func SkipTestAllocations(t *testing.T) {
 		t.Skip("skipping allocations test on plan9")
 	}
 
+	// s390x deviates from other assembly implementations and is very hard to
+	// test due to the lack of LUCI builders. See #67307.
+	if runtime.GOARCH == "s390x" {
+		t.Skip("skipping allocations test on s390x")
+	}
+
 	// Some APIs rely on inliner and devirtualization to allocate on the stack.
 	testenv.SkipIfOptimizationOff(t)
 }