android_webview: Enable FDO support for some targets.

third_party/sqlite/sqlite.gyp

Index: third_party/sqlite/sqlite.gyp
diff --git a/third_party/sqlite/sqlite.gyp b/third_party/sqlite/sqlite.gyp
index c1ec3bc3bd0850ad579808d2125f13893a89f7cd..6be9f53a05b35f180804b6924827b7a3982aab7e 100644
--- a/third_party/sqlite/sqlite.gyp
+++ b/third_party/sqlite/sqlite.gyp
@@ -161,6 +161,12 @@
                 '-Wno-pointer-to-int-cast',
               ],
             }],
+            # Enable feedback-directed optimisation for sqlite when building in android.
+            ['android_webview_build == 1', {
+              'aosp_build_settings': {
+                'LOCAL_FDO_SUPPORT': 'true',
+              },
+            }],
           ],
         }],
       ],