compile success for libsepl in kernel

kernel/libsepol/utils/chkcon.c

@@ -0,0 +1,44 @@
+#include <sepol/sepol.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+void usage(char*) __attribute__((noreturn));
+
+void usage(char *progname)
+{
+	printf("usage:  %s policy context\n", progname);
+	exit(1);
+}
+
+int main(int argc, char **argv)
+{
+	FILE *fp;
+
+	if (argc != 3)
+		usage(argv[0]);
+
+	fp = fopen(argv[1], "r");
+	if (!fp) {
+		fprintf(stderr, "Can't open '%s':  %s\n",
+			argv[1], strerror(errno));
+		exit(1);
+	}
+	if (sepol_set_policydb_from_file(fp) < 0) {
+		fprintf(stderr, "Error while processing %s:  %s\n",
+			argv[1], strerror(errno));
+		exit(1);
+	}
+	fclose(fp);
+
+	if (sepol_check_context(argv[2]) < 0) {
+		fprintf(stderr, "%s is not valid\n", argv[2]);
+		exit(1);
+	}
+
+	printf("%s is valid\n", argv[2]);
+	exit(0);
+}