Update sqlite to 3.7.3.

third_party/sqlite/src/test/rdonly.test

Index: third_party/sqlite/src/test/rdonly.test
diff --git a/third_party/sqlite/src/test/rdonly.test b/third_party/sqlite/src/test/rdonly.test
index a975cef97b1b5610cd312b2b7c866df02aa07a84..bf19597871ac4dc07dd9d21bb3746f6e9ca14447 100644
--- a/third_party/sqlite/src/test/rdonly.test
+++ b/third_party/sqlite/src/test/rdonly.test
@@ -18,6 +18,10 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
+# Do not use a codec for tests in this file, as the database file is
+# manipulated directly using tcl scripts (using the [hexio_write] command).
+#
+do_not_use_codec
 
 # Create a database.
 #
@@ -29,7 +33,7 @@ do_test rdonly-1.1 {
   }
 } {1}
 
-# Changes the write version from 1 to 2.  Verify that the database
+# Changes the write version from 1 to 3.  Verify that the database
 # can be read but not written.
 #
 do_test rdonly-1.2 {
@@ -37,7 +41,7 @@ do_test rdonly-1.2 {
   hexio_get_int [hexio_read test.db 18 1]
 } 1
 do_test rdonly-1.3 {
-  hexio_write test.db 18 02
+  hexio_write test.db 18 03
   sqlite3 db test.db
   execsql {
     SELECT * FROM t1;
@@ -67,8 +71,10 @@ do_test rdonly-1.5 {
 # write-version is reloaded). This way, SQLite does not discover that
 # the database is read-only until after it is locked.
 #
+set ro_version 02
+ifcapable wal { set ro_version 03 }
 do_test rdonly-1.6 {
-  hexio_write test.db 18 02              ; # write-version
+  hexio_write test.db 18 $ro_version     ; # write-version
   hexio_write test.db 24 11223344        ; # change-counter
   catchsql {
     INSERT INTO t1 VALUES(2);