Add //third_party/sqlite to dirs_to_snapshot, remove net_sql.patch

third_party/sqlite/src/test/walmode.test

Index: third_party/sqlite/src/test/walmode.test
diff --git a/third_party/sqlite/src/test/walmode.test b/third_party/sqlite/src/test/walmode.test
index 11113c6be3e6e1f50c42f4cc6e38be93c107fb8e..4e14d54d4f71551a04f0f9a0d8aceb87ebf987a8 100644
--- a/third_party/sqlite/src/test/walmode.test
+++ b/third_party/sqlite/src/test/walmode.test
@@ -295,7 +295,7 @@ db close
 # loaded when sqlite3_prepare_v2() is called to compile the statement.
 #
 do_test walmode-7.0 {
-  file delete -force test.db
+  forcedelete test.db
   sqlite3 db test.db
   execsql {
     PRAGMA journal_mode = WAL;