res: Add (debug) to version string.

To avoid confusion between releases in the crash reports.
jni: Suppress benign compiler warning.

This suppresses the warning:
  "note: the mangling of 'va_list' has changed in GCC 4.4"

Apparently benign:
https://groups.google.com/forum/?fromgroups=#!topic/android-ndk/mrk5dDqWioM