validation: Add system validation

Signed-off-by: Zhou Hao <zhouhao@cn.fujitsu.com>

Author: Zhou Hao

validation/process_rlimits.go

@@ -1,10 +1,18 @@
 package main
 
 import (
+	"os"
+	"runtime"
+
 	"github.com/opencontainers/runtime-tools/validation/util"
 )
 
 func main() {
+	if "linux" != runtime.GOOS && "solaris" != runtime.GOOS {
+		util.Skip("POSIX-specific process.rlimits test", map[string]string{"OS": runtime.GOOS})
+		os.Exit(0)
+	}
+
 	g := util.GetDefaultGenerator()
 	g.AddProcessRlimits("RLIMIT_NOFILE", 1024, 1024)
 	err := util.RuntimeInsideValidate(g, nil)