Track move of APEX module tz files under etc/tz

The same prebuilts will be used in both runtime and time zone
modules. Having the rules put the files in etc/tz/ will make
them more appropriate for the runtime module.

Bug: 119026403
Test: build /boot only
Change-Id: Ia1370457e9d1547b35ed56bb385213d3727c8b9a
diff --git a/libc/tzcode/bionic.cpp b/libc/tzcode/bionic.cpp
index 51fd39a..ee835b2 100644
--- a/libc/tzcode/bionic.cpp
+++ b/libc/tzcode/bionic.cpp
@@ -205,7 +205,7 @@
                                  olson_id, entry_length);
   if (fd >= 0) return fd;
 
-  fd = __bionic_open_tzdata_path("/apex/com.android.tzdata/etc/tzdata",
+  fd = __bionic_open_tzdata_path("/apex/com.android.tzdata/etc/tz/tzdata",
                                  olson_id, entry_length);
   if (fd >= 0) return fd;