test: Add trivial vDSO test

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

test/Makefile

@@ -3,6 +3,7 @@ SRCS	+= test-rnd-from-file.c
 SRCS	+= test-shmem-async.c
 SRCS	+= test-shmem-three-async.c
 SRCS	+= test-pipe-async.c
+SRCS	+= test-vdso.c
 
 SRCS-TH	+= test-pthreads.c
 OBJS-TH += $(patsubst %.c,%.o,$(SRCS-TH))

test/test-vdso.c

+#include <stdio.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+
+int main(int argc, char *argv[])
+{
+	int counter = 0;
+	struct timeval tv;
+	struct timezone tz;
+
+	printf("%s pid %d\n", argv[0], getpid());
+
+	while (1) {
+		gettimeofday(&tv, &tz);
+		printf("Pid: %10d time: %10li\n",
+		       getpid(), tv.tv_sec);
+		sleep(3);
+	}
+
+	return 0;
+}