Update install scripts

Author: Matt Mason

Microsoft.Azure.Functions.NodeJsWorker.targets

@@ -23,7 +23,7 @@
   </Target>
 
   <Target Name="GetGrpcBinPath" Condition="$(GrpcBinary)==''">
-    <Exec Command="node getNativeFile.js" ConsoleToMSBuild="true" WorkingDirectory="$(GrpcPath)">
+    <Exec Command="node ./getNativeFile.js" ConsoleToMSBuild="true" WorkingDirectory="$(GrpcPath)">
       <Output TaskParameter="ConsoleOutput" PropertyName="GrpcBinary" />
     </Exec>
   </Target>

getNativeFile.js

@@ -3,7 +3,7 @@ try {
   nodeAbi = require('./lib/node_modules/node-abi');
 }
 catch (e) {
-  nodeAbi = require('./node_modules/node-abi');
+  nodeAbi = require('node-abi');
 }
 
 var abi = nodeAbi.getAbi(process.version, 'node');