vendor: Add Gboard overlay [1/2]

Change-Id: Ibaf2e7455ce33d52b429d8ea44f5773cd82a2d16
diff --git a/config/packages.mk b/config/packages.mk
index 1abf3d2..d12102f 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -56,7 +56,8 @@
     DarknessMeisterTheme \
     SmokedGreenTheme \
     Bl4ckAndYell0Theme \
-    OmniTheme
+    OmniTheme \
+    GboardDarkTheme
 
 PRODUCT_PACKAGES += \
     Launcher3Dark