fixed d575a66f from https://gitee.com/maweiye/third_party_musl/pulls/672

fix ndk build error "undefined reference"
Signed-off-by: Nmaweiye <maweiye@huawei.com>

libc.map.txt

-LIBC {
+{
   global:
     ___environ;
     __adjtime64;
@@ -2060,4 +2060,4 @@ LIBC {
     trace_marker_async_end;
     trace_marker_count;
     trace_marker_end;
-};
\ No newline at end of file
+};