build: Update fontconfig to fall back on Droid.

src/rootfs_static_data/common/etc/X11/xorg.conf

Index: src/rootfs_static_data/common/etc/X11/xorg.conf
diff --git a/src/rootfs_static_data/common/etc/X11/xorg.conf b/src/rootfs_static_data/common/etc/X11/xorg.conf
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index 0000000000000000000000000000000000000000..7accc8dccaea0e0b6fc02cf97a35a3a683842b6d
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+# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Setting up things manually here lets us avoid HAL overhead.
+# TODO: Per-device xorg.conf rather than this one generic version.
+Section "ServerFlags"
+    Option "AutoAddDevices" "false"
+    Option "DontZap" "false"
+EndSection
+
+Section "InputDevice"
+    Identifier "Keyboard1"
+    Driver     "kbd"
+    Option     "AutoRepeat" "250 30"
+    Option     "XkbRules"   "xorg"
+    Option     "XkbModel"   "pc104"
+    Option     "CoreKeyboard"
+EndSection
+
+Section "InputDevice"
+    Identifier "Mouse1"
+    Driver     "synaptics"
+    Option     "SendCoreEvents" "true"
+    Option     "Protocol" "auto-dev"
+    Option     "SHMConfig" "on"
+    Option     "CorePointer"
+    Option     "MinSpeed" "0.2"
+    Option     "MaxSpeed" "0.5"
+    Option     "AccelFactor" "0.002"
+    Option     "HorizScrollDelta" "100"
+    Option     "VertScrollDelta" "100"
+    Option     "HorizEdgeScroll" "0"
+    Option     "VertEdgeScroll" "1"
+    Option     "TapButton1" "1"
+    Option     "TapButton2" "2"
+    Option     "MaxTapTime" "180"
+    Option     "FingerLow" "24"
+    Option     "FingerHigh" "50"
+EndSection
+
+# Everything after this point was added to include support for USB as a
+# secondary mouse device.
+Section "InputDevice"
+  Identifier "USBMouse"
+  Driver "mouse"
+  Option "Device" "/dev/input/mice" # multiplexed HID mouse input device
+  Option "Protocol" "IMPS/2"
+  Option "ZAxisMapping" "4 5" # support a wheel as buttons 4 and 5
+  Option "Emulate3Buttons" "true"  # just in case it is a 2 button
+EndSection
+
+# Defines a non-default server layout which pulls in the USB Mouse as a
+# secondary input device.
+Section "ServerLayout"
+  Identifier "DefaultLayout"
+  # Screen "DefaultScreen"
+  InputDevice "Mouse1" "CorePointer"
+  InputDevice "USBMouse" "AlwaysCore"
+  InputDevice "Keyboard1" "CoreKeyboard"
+EndSection