[libFuzzer] Ensure that sqlite3_prepare_v2_fuzzer never writes to disk.

testing/libfuzzer/fuzzers/sqlite3_prepare_v2_fuzzer.cc

Index: testing/libfuzzer/fuzzers/sqlite3_prepare_v2_fuzzer.cc
diff --git a/testing/libfuzzer/fuzzers/sqlite3_prepare_v2_fuzzer.cc b/testing/libfuzzer/fuzzers/sqlite3_prepare_v2_fuzzer.cc
index cd7e3b4ce50eb000ce90247287831769108fb209..8f7d90a643e56d0b5cc879faef1b39e68361f9b1 100644
--- a/testing/libfuzzer/fuzzers/sqlite3_prepare_v2_fuzzer.cc
+++ b/testing/libfuzzer/fuzzers/sqlite3_prepare_v2_fuzzer.cc
@@ -42,7 +42,13 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     return 0;
 
   sqlite3* db;
-  if (SQLITE_OK != sqlite3_open(":memory:", &db))
+  int return_code = sqlite3_open_v2(
+      "db.db",
+      &db,
+      SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_MEMORY, 0);
+
+
+  if (SQLITE_OK != return_code)
     return 0;
 
   // Use first byte as random selector for other parameters.