fix(ios): remove Frameworks directory prior to copying

If any framework underneath changes (say the appc-cli is injecting the appc-verify pieces) then it
will cause the Frameworks to be copied again and as there are symlinks the copy will get funky
and try to place symlinks underneath each other. Removing the directory before copying just
prevents this error from happening

iphone/cli/commands/_build.js

@@ -4708,7 +4708,7 @@ iOSBuilder.prototype.copyTitaniumiOSFiles = function copyTitaniumiOSFiles() {
 						// The content of Frameworks directory only change if we change SDK version. So it is safe to copy whole directory.
 						// Copy whole 'Frameworks' directory from SDK to build directory, to preserve symlink available in Titaniumkit.xcframework.
 						// TODO: Is there any better way to do this?
-
+						fs.emptyDirSync(path.join(this.buildDir, dir));
 						fs.copySync(path.join(this.platformPath, dir), path.join(this.buildDir, dir));
 						copyFrameworks = false;
 					}