gpio: Add cpp example to use IO.

* Patch direction setting

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>

examples/blink-io8.cpp

@@ -0,0 +1,20 @@
+#include "stdio.h"
+
+#include "maa.h"
+
+int
+main(int argc, char **argv)
+{
+    fprintf(stdout, "MAA Version: %d\n Starting Blinking on IO8", get_version());
+    gpio_t gpio;
+    gpio_init(&gpio, 26);
+    gpio_dir(&gpio, "out");
+
+    while(1){
+        gpio_write(&gpio, 0);
+        sleep(1);
+        gpio_write(&gpio, 1);
+        sleep(1);
+    }
+    return 0;
+}