Move sunflower to a new directory, make final tweaks to make it all work.

test/test.sh

Index: test/test.sh
diff --git a/test/test.sh b/test/test.sh
index 5d74c8d312193dfde2cb1281827715bfb7e0d1f8..de2a1893b26ecd9aeb3b0c398d56dc9f2d593cd1 100755
--- a/test/test.sh
+++ b/test/test.sh
@@ -42,7 +42,8 @@ dart -c test/all_tests.dart || fail
 
 # validate codegen_test output
 pushd test/codegen/ &> /dev/null
-rm -r actual/dev_compiler/ actual/server_mode/dev_compiler/
+rm -r actual/dev_compiler/ actual/server_mode/dev_compiler/ \
+  actual/sunflower/dev_compiler
 diff $DIFF_ARGS > /dev/null || show_diff
 popd &> /dev/null