Resolved IE8 test failures

- Additional checks for its buggy defineProperty(), etc implementation

lib/util.js

@@ -434,7 +434,8 @@ exports.arrayShrink = function( items )
  *
  * @return  {Object}  descriptor for requested property or undefined if not found
  */
-exports.getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor
+exports.getOwnPropertyDescriptor =
+    ( can_define_prop && Object.getOwnPropertyDescriptor )
     || function( obj, prop )
     {
         if ( !Object.prototype.hasOwnProperty.call( obj, prop ) )

test/MemberBuilder/GetterSetterTest.js

@@ -22,8 +22,10 @@
  * @package test
  */
 
-var shared = require( __dirname + '/inc-common' ),
-    es5    = ( typeof Object.defineProperty === 'function' ) ? true : false;
+var common = require( 'common' ),
+    shared = require( __dirname + '/inc-common' ),
+    es5    = !( common.require( 'util' ).definePropertyFallback() )
+;
 
 require( 'common' ).testCase(
 {

test/MemberBuilder/VisibilityTest.js

@@ -23,7 +23,8 @@
  */
 
 // get-set-test (supported)
-var gst = ( typeof Object.defineProperty === 'function' ) ? true : false;
+var common = require( 'common' ),
+    gst    = !( common.require( 'util' ).definePropertyFallback() )
 
 
 require( 'common' ).testCase(

test/test-util-get-property-descriptor.js

@@ -36,7 +36,7 @@ var common = require( './common' ),
  */
 ( function testUtilGetOwnPropertyDescriptorIsObjectsIfAvailable()
 {
-    if ( Object.getOwnPropertyDescriptor )
+    if ( get_set && Object.getOwnPropertyDescriptor )
     {
         assert.strictEqual(
             util.getOwnPropertyDescriptor,