Fix the map for pthread_cond_timedwait_monotonic_np.

Bug: https://github.com/android-ndk/ndk/issues/708
Test: builds
Change-Id: Icaa1f8cb796a0a117cbe2e10391c965c857d6d37
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index 6bbffba..ebe2098 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -771,7 +771,7 @@
     pthread_cond_signal;
     pthread_cond_timedwait;
     pthread_cond_timedwait_monotonic; # arm x86 mips
-    pthread_cond_timedwait_monotonic_np; # introduced-arm=16 introduced-x86=16 introduced-mips=16 introduced-arm64=28 introduced-x64_64=28 introduced-mips64=28
+    pthread_cond_timedwait_monotonic_np; # introduced-arm=9 introduced-x86=9 introduced-mips=9 introduced-arm64=28 introduced-x64_64=28 introduced-mips64=28
     pthread_cond_timedwait_relative_np; # arm x86 mips
     pthread_cond_timeout_np; # arm x86 mips
     pthread_cond_wait;