Fix sha1 of test262

While .gitmodules was pointing at the new URL, the sha1 for the submodule
was pointing to the old github repository.

Change-Id: Ie0b9f39e13a6e759249aaaf0e90c5a242bb36134
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

diff --git a/tests/manual/v4/test262 b/tests/manual/v4/test262
index 0b5af3dcec772bb06b4d685a20b2859cda59d189..9741ac4655808ac46c127e3d1d8ba3d27ada618e 160000 (submodule)
--- a/tests/manual/v4/test262
+++ b/tests/manual/v4/test262
@@ -1 +1 @@
-Subproject commit 0b5af3dcec772bb06b4d685a20b2859cda59d189
+Subproject commit 9741ac4655808ac46c127e3d1d8ba3d27ada618e