[sql] Patch SQLite to allow control of close-time WAL checkpoint.

third_party/sqlite/src/src/pager.c

Index: third_party/sqlite/src/src/pager.c
diff --git a/third_party/sqlite/src/src/pager.c b/third_party/sqlite/src/src/pager.c
index 74c76f37306e0d0db5763e52cf3a7a82ff65f13e..9201555760e0ad515d0fbe405601c5f20a10366c 100644
--- a/third_party/sqlite/src/src/pager.c
+++ b/third_party/sqlite/src/src/pager.c
@@ -3991,7 +3991,7 @@ static void pagerFreeMapHdrs(Pager *pPager){
 ** a hot journal may be left in the filesystem but no error is returned
 ** to the caller.
 */
-int sqlite3PagerClose(Pager *pPager){
+int sqlite3PagerClose(Pager *pPager, sqlite3 *db){
   u8 *pTmp = (u8 *)pPager->pTmpSpace;
 
   assert( assert_pager_state(pPager) );
@@ -4001,7 +4001,9 @@ int sqlite3PagerClose(Pager *pPager){
   /* pPager->errCode = 0; */
   pPager->exclusiveMode = 0;
 #ifndef SQLITE_OMIT_WAL
-  sqlite3WalClose(pPager->pWal, pPager->ckptSyncFlags, pPager->pageSize, pTmp);
+  sqlite3WalClose(pPager->pWal, pPager->ckptSyncFlags, pPager->pageSize,
+                  (db && (db->flags & SQLITE_NoCkptOnClose) ? 0 : pTmp)
+  );
   pPager->pWal = 0;
 #endif
   pager_reset(pPager);