By-pass shell script checking tool on Windows

Author: piranna

binding.gyp

@@ -1,11 +1,12 @@
 {
-    'variables':
-    {
-        'shared%': '<!(node ./util/has_lib.js)'
-    },
     'conditions':
     [
-        ['shared=="true" or OS=="win"', {
+        ['OS=="win"', {
+            'variables': {'shared%': 'true'}
+        }, {
+            'variables': {'shared%': '<!(node ./util/has_lib.js)'}
+        }],
+        ['shared=="true"', {
             'includes': ['shared.gypi']
         }, {
             'includes': ['static.gypi']