isr.js: add node.js isr example

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

api/mraa/gpio.hpp

@@ -140,8 +140,7 @@ class Gpio {
 
         mraa_result_t isr(Edge mode, v8::Handle<v8::Function> func) {
             m_v8isr = v8::Persistent<v8::Function>::New(func);
-            mraa_gpio_isr(m_gpio, (gpio_edge_t) mode, &uvwork, this);
-            return MRAA_SUCCESS;
+            return mraa_gpio_isr(m_gpio, (gpio_edge_t) mode, &uvwork, this);
         }
 #else
         /**

examples/javascript/isr.js

@@ -0,0 +1,10 @@
+#!/usr/bin/env node
+
+var m = require('mraa')
+
+function h() {
+  console.log("HELLO!!!!")
+}
+
+x = new m.Gpio(14)
+x.isr(m.EDGE_BOTH, h)