Update the status for S and T.

Test: treehugger
Change-Id: I21c4374d7e55dbbb2294cef5cc7bf50b7fe1b549
diff --git a/docs/status.md b/docs/status.md
index 9d3ad88..9521da8 100644
--- a/docs/status.md
+++ b/docs/status.md
@@ -50,6 +50,21 @@
 
 Current libc symbols: https://android.googlesource.com/platform/bionic/+/master/libc/libc.map.txt
 
+New libc functions in T (API level 32):
+  * `backtrace`, `backtrace_symbols`, `backtrace_symbols_fd` (`<execinfo.h>`).
+  * New system call wrappers: `preadv2`, `preadv64v2`, `pwritev2`,
+    `pwritev64v2`.
+
+New libc functions in S (API level 31):
+  * New hooks for sanitizers for TLS access: `__libc_get_static_tls_bounds`,
+    `__libc_register_thread_exit_callback`, `__libc_iterate_dynamic_tls`,
+    `__libc_register_dynamic_tls_listeners`.
+  * New helper to allow the zygote to give each zygote child its own stack
+    cookie (currently unused): `android_reset_stack_guards`.
+  * Non-inline symbols for `ffsl`, `ffsll`.
+  * New system call wrappers: `pidfd_getfd`, `pidfd_open`, `pidfd_send_signal`,
+    `process_madvise`.
+
 New libc functions in R (API level 30):
   * Full C11 `<threads.h>` (available as inlines for older API levels).
   * `memfd_create` and `mlock2` (Linux-specific GNU extensions).