Fix an invalid casting from char * to NSString *. (#537)

diff --git a/src/ios-deploy/ios-deploy.m b/src/ios-deploy/ios-deploy.m
index 84539ba..015f8ac 100644
--- a/src/ios-deploy/ios-deploy.m
+++ b/src/ios-deploy/ios-deploy.m
@@ -2283,7 +2283,7 @@
   
     NSLogJSON(@{@"Event": @"DyldCacheExtract",
                  @"Source": (__bridge NSString *)shared_cache_file_path,
-                 @"Destination": (__bridge NSString *)extraction_root_path,
+                 @"Destination": @(extraction_root_path),
               });
 
     __block uint64_t last_time =