Switch to blueprint's microfactory

Bug: 63720725
Test: m -j nothing
Test: mkdir o; ../bootstrap.bash; ./soong
Change-Id: Id1f8312678f36afd08b49f8511fec3e6e5ba8de2

soong_ui.bash

@@ -50,9 +50,9 @@ function gettop
 # Save the current PWD for use in soong_ui
 export ORIGINAL_PWD=${PWD}
 export TOP=$(gettop)
-source ${TOP}/build/soong/cmd/microfactory/microfactory.bash
+source ${TOP}/build/soong/scripts/microfactory.bash
 
-build_go soong_ui android/soong/cmd/soong_ui
+soong_build_go soong_ui android/soong/cmd/soong_ui
 
 cd ${TOP}
 exec "$(getoutdir)/soong_ui" "$@"