build: introduction of archConvertStatFs function

Fixes: kata-containers#908

Not all the architectures convert the StatFs to int64 (e.g s390x). The
function archConvertStatFs could be reimplemented for other architecture
to correctly convert the StatFs.Type.

Signed-off-by: Alice Frosi <afrosi@de.ibm.com>

cli/oci.go

@@ -123,7 +123,7 @@ func isCgroupMounted(cgroupPath string) bool {
 		return false
 	}
 
-	if statFs.Type != int64(cgroupFsType) {
+	if statFs.Type != archConvertStatFs(cgroupFsType) {
 		return false
 	}
 

cli/utils_arch_base.go

@@ -0,0 +1,7 @@
+// +build !s390x
+
+package main
+
+func archConvertStatFs(cgroupFsType int) int64 {
+	return int64(cgroupFsType)
+}