Temporarily disable ld --fatal-warnings.

external/netcat/netcat.c:323: warning: warning: mktemp() possibly
used unsafely; consider using mkstemp()

Change-Id: I3f1a1a29009f87d4df1224c8588e4496a78b2ef4
Merge tag 'android-4.3_r2.1' into jellybean-mr2.1

Android 4.3 release 2.1