The future is now (2019 edition).

This year, we accidentally shipped NDK r20beta1 first :-(

Bug: https://github.com/android-ndk/ndk/issues/932
Test: builds
Change-Id: Id66a16ea09e7928843e61612fbdef09e72610d49
diff --git a/libc/include/time.h b/libc/include/time.h
index ea41fda..48c5efc 100644
--- a/libc/include/time.h
+++ b/libc/include/time.h
@@ -109,7 +109,7 @@
 time_t timegm(struct tm* __tm) __INTRODUCED_IN(12);
 
 #define TIME_UTC 1
-int timespec_get(struct timespec* __ts, int __base) __INTRODUCED_IN_FUTURE;
+int timespec_get(struct timespec* __ts, int __base) __INTRODUCED_IN(29);
 
 __END_DECLS