fix: prevent error when adding framework from build product dir (#20)

Author: farfromrefug

lib/pbxFile.js

@@ -128,9 +128,11 @@ function pbxFile(filepath, opt) {
     if (opt.explicitFileType) {
         this.explicitFileType = opt.explicitFileType;
         this.basename = this.basename + '.' + defaultExtension(this);
-        delete this.path;
+        // dont delete path as it is used after
+        // delete this.path;
         delete this.lastKnownFileType;
-        delete this.group;
+        // dont delete group as it is used after
+        // delete this.group;
         delete this.defaultEncoding;
     }
 
@@ -155,4 +157,4 @@ function pbxFile(filepath, opt) {
     }
 }
 
-module.exports = pbxFile;
+module.exports = pbxFile;