[sql] Import SQLite 3.17.0.

third_party/sqlite/src/src/test_devsym.c

Index: third_party/sqlite/src/src/test_devsym.c
diff --git a/third_party/sqlite/src/src/test_devsym.c b/third_party/sqlite/src/src/test_devsym.c
index 21f0f684d861116770defcdecd532ba3eeaba975..9a1ba09d69bc0fc61e0e898c616157bf1bcc473c 100644
--- a/third_party/sqlite/src/src/test_devsym.c
+++ b/third_party/sqlite/src/src/test_devsym.c
@@ -133,7 +133,8 @@ struct DevsymGlobal g = {0, 0, 512};
 */
 static int devsymClose(sqlite3_file *pFile){
   devsym_file *p = (devsym_file *)pFile;
-  return sqlite3OsClose(p->pReal);
+  sqlite3OsClose(p->pReal);
+  return SQLITE_OK;
 }
 
 /*
@@ -395,4 +396,11 @@ void devsym_register(int iDeviceChar, int iSectorSize){
   }
 }
 
+void devsym_unregister(){
+  sqlite3_vfs_unregister(&devsym_vfs);
+  g.pVfs = 0;
+  g.iDeviceChar = 0;
+  g.iSectorSize = 0;
+}
+
 #endif