Fix documentation dependencies for included files

Included files use the expanded version during the include,
which requires the expansion to be created by Buck before
asciidoc is invoked.

Change-Id: I36184fee5ee49cea13229f2c857d00e055bce8a7
diff --git a/Documentation/config.defs b/Documentation/config.defs
index c3904cb..af5c729 100644
--- a/Documentation/config.defs
+++ b/Documentation/config.defs
@@ -1,3 +1,8 @@
+DOCUMENTATION_DEPS = {
+  "install-quick.txt": ["config-login-register.txt"],
+  "install.txt": ["database-setup.txt"],
+}
+
 def documentation_attributes(revision):
   return [
     'toc',