Always setup the native bridge library

... even if the string is empty. This will initialize the native bridge
library but mark it as unavailable.

- also, rename native_bridge_library_path to
native_bridge_library_filename to be closer to the actual meaning (it's
just the filename without any path).

Bug: 16404669

(cherry picked from commit I94628639691459d48d1fbf0841f36b68d51818e7)

Change-Id: I94628639691459d48d1fbf0841f36b68d51818e7
diff --git a/runtime/parsed_options.h b/runtime/parsed_options.h
index 1afd610..5c71f98 100644
--- a/runtime/parsed_options.h
+++ b/runtime/parsed_options.h
@@ -46,7 +46,7 @@
   bool check_jni_;
   bool force_copy_;
   std::string jni_trace_;
-  std::string native_bridge_library_path_;
+  std::string native_bridge_library_filename_;
   CompilerCallbacks* compiler_callbacks_;
   bool is_zygote_;
   bool must_relocate_;