Support custom libraries with portable version of Arduino (#946)

* Support custom libraries in portable version

* Change path location for custom package tool

see #946

Author: raomin

src/arduino/arduino.ts

@@ -668,9 +668,9 @@ Please make sure the folder is not occupied by other procedures .`);
                 // Arduino built-in libraries
                 includePath.push(path.join(this._settings.arduinoPath, "libraries", "**"));
                 // Arduino custom package tools
-                includePath.push(path.join(os.homedir(), "Documents", "Arduino", "hardware", "tools", "**"));
+                includePath.push(path.join(this._settings.sketchbookPath, "hardware", "tools", "**"));
                 // Arduino custom libraries
-                includePath.push(path.join(os.homedir(), "Documents", "Arduino", "libraries", "**"));
+                includePath.push(path.join(this._settings.sketchbookPath, "libraries", "**"));
 
                 const forcedInclude = this.getDefaultForcedIncludeFiles();