Update fork_aosp utility to 4.4.3_r1.1 by default

Change-Id: I922360c01d7c5acfd73d89b9652d40b8d37d9db4
diff --git a/utils/fork_aosp.sh b/utils/fork_aosp.sh
index 3064b42..3284095 100755
--- a/utils/fork_aosp.sh
+++ b/utils/fork_aosp.sh
@@ -6,7 +6,7 @@
 ANDROID_ROOT=~/omni
 PREFIX=android_
 BRANCH=android-4.4
-SOURCE=android-4.4.2_r1
+SOURCE=android-4.4.3_r1.1
 MANIFEST=android/default.xml
 GITHUB_ORG=omnirom
 USERNAME=xplodwild