Upgrade to tzdata2013g.

From the release notes:

  Changes affecting current and near-future time stamps

    Morocco now observes DST from the last Sunday in March to the last
    Sunday in October, not April to September respectively.  (Thanks
    to Steffen Thorsen.)

Change-Id: I9a657a1b819ce17bb424474d4bcdae093f4c4dca
diff --git a/libc/zoneinfo/tzdata b/libc/zoneinfo/tzdata
index 5d1d1eb..4d511d5 100644
--- a/libc/zoneinfo/tzdata
+++ b/libc/zoneinfo/tzdata
Binary files differ