Add LTO support for Android Chromium.

This is to add support for a Link-Time Optimizations experiment in Android Chromium. As it is disabled by default, it won't change anything for most configurations.
BUG=chromium:407544
R=andrew@webrtc.org, tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/21299004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7009 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_processing/audio_processing.gypi b/webrtc/modules/audio_processing/audio_processing.gypi
index 98d437f..9298f11 100644
--- a/webrtc/modules/audio_processing/audio_processing.gypi
+++ b/webrtc/modules/audio_processing/audio_processing.gypi
@@ -222,6 +222,13 @@
             ],
             'includes!': ['../../build/arm_neon.gypi',],
           }],
+          # Disable LTO in audio_processing_neon target due to compiler bug
+          ['use_lto==1', {
+            'cflags!': [
+              '-flto',
+              '-ffat-lto-objects',
+            ],
+          }],
         ],
       }],
     }],