Reinclude SearchableDictionary sample app as a demo of third party inclusion in Quick Search Box.

This reverts commit 3e83e8bc8b969a993b026dab9d13b99b315d9af0.
diff --git a/build/sdk.atree b/build/sdk.atree
index f2b747e..16d65de 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -75,6 +75,7 @@
 development/samples/Snake platforms/${PLATFORM_NAME}/samples/Snake
 development/samples/SoftKeyboard platforms/${PLATFORM_NAME}/samples/SoftKeyboard
 development/samples/JetBoy platforms/${PLATFORM_NAME}/samples/JetBoy
+development/samples/SearchableDictionary platforms/${PLATFORM_NAME}/samples/SearchableDictionary
 
 # dx
 bin/dx platforms/${PLATFORM_NAME}/tools/dx