Really add adjtimex(2), and add clock_adjtime(2) too.

Change-Id: I81fde2ec9fdf787bb19a784ad13df92d33a4f852
diff --git a/libc/libc.arm.brillo.map b/libc/libc.arm.brillo.map
index 9251de2..01541a9 100644
--- a/libc/libc.arm.brillo.map
+++ b/libc/libc.arm.brillo.map
@@ -1224,6 +1224,8 @@
     __pwrite_chk;
     __pwrite64_chk;
     __write_chk;
+    adjtimex;
+    clock_adjtime;
     fgetpos64;
     fileno_unlocked;
     fopen64;