win,msi: create npm folder in AppData directory

Create the empty npm folder in Roaming\Appdata so that non-Administrator
users have a place to store global packages. This fixes the error Error:
ENOENT, stat error that occurs when a user tries to run the npm install
<package> command.

Bug: https://github.com/joyent/node/issues/8141
PR: https://github.com/joyent/node/pull/8838
Reviewed-by: Bert Belder <bertbelder@gmail.com>

tools/msvs/msi/product.wxs

@@ -46,6 +46,7 @@
       <ComponentRef Id="NodeExecutable"/>
       <ComponentRef Id="NodeVarsScript"/>
       <ComponentRef Id="NodeStartMenuAndRegistryEntries"/>
+      <ComponentRef Id="AppData" />
       <ComponentGroupRef Id="Product.Generated"/>
 
       <Feature Id="NodePerfCtrSupport"
@@ -70,6 +71,7 @@
       <ComponentRef Id="NpmCmdScript"/>
       <ComponentRef Id="NpmBashScript"/>
       <ComponentRef Id="NpmConfigurationFile"/>
+      <ComponentRef Id="AppData" />
       <ComponentGroupRef Id="NpmSourceFiles"/>
     </Feature>
 
@@ -184,6 +186,16 @@
           </Component>
         </Directory>
       </Directory>
+
+      <Directory Id="AppDataFolder">
+        <Directory Id="AppDataDir" Name="npm">
+          <Component Id="AppData" Guid="D3B35D0E-D0F9-4D11-A773-D4608E90E1D1">
+            <CreateFolder />
+            <RemoveFolder Id="AppDataDir" On="uninstall" />
+            <RegistryValue Root="HKCU" Key="$(var.RegistryKeyPath)\Components" Type="string" Value="" />
+          </Component>
+        </Directory>
+      </Directory>
     </DirectoryRef>
 
     <DirectoryRef Id="ApplicationProgramsFolder">