Get SQLite to build

* changed headers
* removed redundant declarations
* ran clang-format
* added sqlite3.mk

third_party/sqlite3/fts3_hash.c

@@ -13,6 +13,7 @@
 ** We've modified it slightly to serve as a standalone hash table
 ** implementation for the full-text indexing module.
 */
+/* clang-format off */
 
 /*
 ** The code in this file is only compiled if:
@@ -23,14 +24,13 @@
 **     * The FTS3 module is being built into the core of
 **       SQLite (in which case SQLITE_ENABLE_FTS3 is defined).
 */
-#include "fts3Int.h"
+#include "third_party/sqlite3/fts3Int.h"
 #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS3)
 
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "fts3_hash.h"
+#include "libc/assert.h"
+#include "libc/mem/mem.h"
+#include "libc/str/str.h"
+#include "third_party/sqlite3/fts3_hash.h"
 
 /*
 ** Malloc and Free functions